Iowa Tick Season: Which Ticks Are Out, When They Peak, and How to Avoid a Bite

Iowa’s tick season is longer — and more active — than most people expect. Ticks hit their peak between May and July, but the whole season typically lasts from March to November. That’s nearly nine months of the year when you, your children, and your pets could encounter a tick on a hike, in the backyard, or along a trail edge.

What makes Iowa particularly challenging is that ticks are affected by a combination of ecological and weather patterns such as habitat, host availability, temperature, humidity, and precipitation — and Iowa provides all of them. Knowing when ticks are most dangerous, which species to watch for, and how to respond if you find one attached to your skin can make a real difference for your family’s health this season.

Key Insight: Tick season in Iowa doesn’t end when summer does. Ticks remain active well into fall, so your prevention habits should carry through November.

When Is Tick Season in Iowa

Ticks can be found at any time of the year, though in Iowa they are active from March through November. This wide window catches many Iowans off guard, particularly those who assume ticks are only a summer concern. The reality is that any warm, overcast day in early spring or late fall can bring ticks out of dormancy.

While tick season is considered to be in the spring and summer months — mid-April to August — ticks can appear when the temperature is above about 50 degrees, according to Dr. Christine Petersen, an epidemiology professor at the University of Iowa. That means late February or early March warm spells can already put you at risk.

Ticks are most active from March to November with peak activity in April, May, and June. For Lyme disease specifically, the risk window is even more concentrated. The months with the most risk for contracting Lyme disease from a tick bite are May and June, because that is when the earlier stages of ticks are most active — and the early stages of ticks are the ones that most often carry the disease.

If you spend time outdoors in Iowa — whether hunting geese, chasing pheasants, or hiking state parks — understanding this seasonal window is the first step toward protecting yourself.

Pro Tip: Don’t wait for summer to start your tick-prevention routine. Begin checking yourself and your pets as soon as daytime temperatures consistently reach 50°F — often as early as late February or March in Iowa.

Types of Ticks Found in Iowa

There are more than a dozen species of ticks that can be found in Iowa, according to Iowa State University Extension and Outreach. However, three species account for the vast majority of human encounters and health risks in the state. Each has distinct physical characteristics, preferred habitats, and seasonal patterns worth knowing.

Blacklegged Tick (Deer Tick)

The blacklegged tick, also called the deer tick, is quite small. Adult females measure around 3–5 millimeters long, with reddish-brown bodies and dark legs. What makes them tricky to spot is their size, especially in the juvenile stage (known as a nymph). Nymphs are about the size of a poppy seed — tiny enough to latch on without you even realizing it.

The blacklegged tick is of the most importance to Iowans because it can transmit bacteria that cause Lyme disease. While you’re more likely to encounter a disease-carrying deer tick if you venture into the northeastern or eastern part of the state, deer ticks are found in every county, according to the Iowa Tick Surveillance Program established by Iowa State University.

Nymphs are most abundant between May and July, and they are typically found in grasses and brush. Towards the end of summer through fall, the ticks mature to the adult stage.

American Dog Tick (Wood Tick)

American dog ticks are found predominantly in grassy fields as well as along walkways and trails, and they feed on a variety of warm-blooded animals. They are one of the most visually recognizable ticks in Iowa — larger in size and easier to spot than the deer tick — which is one reason many Iowans are more familiar with them.

Although they are abundant, the American dog tick is not considered to be a serious human health threat in Iowa. They can transmit diseases such as Rocky Mountain Spotted Fever; however, this disease is not common in Iowa. They’re particularly active from late spring through summer.

Lone Star Tick

The Lone Star Tick is abundant in the south central and southeastern US and in recent years has become common in Iowa as well. It is recognized by the white dot on the back of the adult female. The adult feeds on large mammals while the immature ticks prefer birds and small mammals. These ticks are usually found in bushy and grassy areas and can transmit the bacteria of several diseases but not Lyme disease.

One emerging concern tied to the Lone Star tick is Alpha-Gal Syndrome. According to the Mayo Clinic, most people with Alpha-Gal Syndrome in the U.S. get the condition when a Lone Star tick bites them. Numbers are increasing in southern Iowa and working their way up to northern Iowa.

Important Note: You can submit an unidentified tick to the Iowa State University Plant and Insect Diagnostic Clinic for identification. ISU does not test ticks for pathogens, as testing ticks for pathogen presence is not considered useful — but knowing the species can still help guide your medical conversation.

Tick Species	Size	Peak Activity	Primary Habitat	Key Disease Risk
Blacklegged (Deer) Tick	Nymph: poppy seed; Adult: 3–5mm	May–July (nymphs); Fall (adults)	Wooded areas, leaf litter, oak forests	Lyme disease, Babesiosis, Anaplasmosis
American Dog Tick	Larger; easier to see	Late spring through summer	Grassy fields, trails, walkways	Rocky Mountain Spotted Fever, Tularemia
Lone Star Tick	Medium; white dot on female	Spring through summer	Bushy, grassy areas	Ehrlichiosis, Alpha-Gal Syndrome, Tularemia

To better understand how ticks reproduce and why populations can surge in certain years, it helps to know their life cycle — which directly drives seasonal activity patterns.

Tick-Borne Diseases in Iowa

Ticks can carry the organisms that cause diseases like Lyme disease, Rocky Mountain Spotted Fever, and Ehrlichiosis. These aren’t the only illnesses Iowa ticks transmit, but they represent the most commonly reported. One of the biggest challenges with tick-borne illness is that these illnesses can look like COVID, they could look like the flu, and it can be confusing to tease out what’s really causing the symptoms.

Lyme Disease

Lyme disease is an illness caused by a bacteria spread by blacklegged ticks, also known as deer ticks, that if left untreated can cause joint pain, stiffness, irregular heartbeat, and eye pain or vision loss. According to the Iowa Department of Public Health, most cases of Lyme disease in Iowa are reported during June, July, and August, and most of those happen in the eastern half of the state.

Lyme disease cases have tripled since 2010, and that’s largely because the blacklegged tick population is growing — especially in eastern Iowa. The hallmark early symptom is the bull’s-eye rash. Not everyone who gets Lyme disease will have the same symptoms, but the best and earliest sign of infection is a rash that may appear within a few days to a month, usually at the site of the tick bite. The rash will first look like a small, red bump, then expand until it begins to look like a bull’s eye, with a red center and a red ring surrounding a clear area.

Laboratory data suggest that the tick must usually remain attached for 24 to 48 hours before the transmission of Lyme disease can occur. This makes early detection and prompt removal critical.

Rocky Mountain Spotted Fever (RMSF)

Rocky Mountain Spotted Fever is a tickborne disease caused by the bacterium Rickettsia rickettsii. This organism is a cause of potentially fatal human illness in North and South America and is transmitted to humans by the bite of infected tick species. RMSF can be deadly if not treated early with the right antibiotic.

In Iowa, RMSF is primarily associated with the American dog tick. Early symptoms include fever, headache, and a rash that can spread all over. It’s a bacterial infection, so getting antibiotics quickly can make all the difference.

Anaplasmosis and Ehrlichiosis

Anaplasmosis is in the same disease category as ehrlichiosis, which is becoming an increasingly big problem across the United States — including in Iowa. This disease is also transmitted through tick bites, mainly the Lone Star and deer ticks. Though symptoms may take a few weeks to start cropping up, they can lead to respiratory and organ failure over time, which could be fatal. Some of the initial symptoms include red eyes, rashes, fatigue, and fever.

Babesiosis

Babesiosis is caused by a protozoa that is primarily spread by the deer tick. Though most hosts don’t experience symptoms for the first few months or years, over time the microscopic parasites will infect red blood cells and lead to severe anemia. The anemia may be accompanied by other concerning symptoms such as chills, fever, fatigue, and sweating. Thankfully, treatment is available, so if you suspect you have contracted babesiosis, consult your medical provider right away.

Alpha-Gal Syndrome

One of the lesser-known but increasingly reported tick-borne conditions in Iowa is Alpha-Gal Syndrome — a red meat allergy triggered by a Lone Star tick bite. Alpha-Gal Syndrome is not curable and necessitates ongoing management. Those affected may need to adjust their diets and carry epinephrine pens indefinitely. For more information on tick-borne neurological complications, you can also learn about tick-borne encephalitis, a serious viral illness spread by ticks in various parts of the world.

Common Mistake: Many people assume that if they don’t see a bull’s-eye rash, they don’t have a tick-borne illness. In reality, not all diseases produce a rash — and Lyme disease itself doesn’t always present the classic pattern. See a doctor if you feel flu-like symptoms after spending time outdoors.

High-Risk Areas and Habitats in Iowa

Knowing where ticks congregate in Iowa helps you take targeted precautions. Wooded areas, grassy areas, and overgrown places that don’t have a lot of human development are the most common spots for ticks. But you don’t need to be deep in the wilderness to encounter one.

While many associate those types of areas with more rural parts of the state, bigger cities and towns aren’t free of ticks. “People think they’re not exposed to ticks in cities, but ticks can thrive almost anywhere where there’s woodlands, greenery and things like that.”

In Iowa, the eastern half of the state carries the highest risk for Lyme disease, as that’s where blacklegged tick populations are densest. Deer ticks are also more abundant in oak forests. Oak trees are native to Iowa, and you may have some in your yard. There are many oak forests in central Iowa that you may want to avoid in tick season or stick to paths and trails on hikes.

Specific high-risk environments in Iowa include:

• Wooded hiking trails and state parks — especially in eastern and northeastern Iowa where blacklegged ticks are prevalent
• Tall grassy fields and meadows — prime habitat for American dog ticks and Lone Star ticks
• Leaf litter and brush piles — ticks hide here to stay moist and wait for a host
• Yard edges bordering woods or overgrown areas — the transition zone between lawn and woods is a tick hot spot
• Campgrounds and picnic areas — in campgrounds and parks, ticks can be found on picnic benches and wood, so be aware when sitting or resting on picnic benches, logs, and even rocks
• Hunting grounds and fields — especially during dove season and other fall hunts when tall vegetation is common

Ticks live and crawl on low-lying vegetation and attach to small mammals, pets, or people as they pass by. They practice a behavior called “questing” — holding onto grass blades or leaves with their back legs while reaching out with their front legs to grab onto a passing host.

Pro Tip: When hiking, stay in the center of trails and avoid brushing against vegetation on the sides. Most tick encounters happen at trail edges, not in the middle of dense forest.

How to Protect Yourself, Children, and Pets During Tick Season in Iowa

Safeguarding yourself from ticks requires protecting yourself before, during, and after spending time outdoors. The good news is that consistent, simple habits can significantly reduce your risk — even during peak season.

Before You Head Outside

1. Dress strategically. Make sure to wear a hat, long sleeves, pants, and socks — you can even tuck your pants into your socks — whatever you can do to make sure ticks can’t get under your clothes and onto your skin.
2. Apply EPA-registered repellent. Use repellent that contains 20 percent or more DEET, picaridin, or IR3535 on exposed skin for protection that lasts several hours. Always follow product instructions. Parents should apply this product to their children, avoiding hands, eyes, and mouth.
3. Treat your clothing with permethrin. Use products that contain permethrin on clothing. Treat clothing and gear, such as boots, pants, socks, and tents with products containing 0.5% permethrin.
4. Choose light-colored clothing. Light colors make it much easier to spot a crawling tick before it attaches.

While You’re Outdoors

1. Stay on the trail. Staying on trails and avoiding long grass can help prevent getting ticks.
2. Walk in the center of paths. Avoid brushing against vegetation on either side, which is where ticks wait for hosts.
3. Do periodic checks. Anytime you’re in the outdoors, do a tick check before you get home or get in the car to head home. Look up and down your pant legs — a lot of the time, they start from the foot and crawl their way up.

After Coming Indoors

1. Shower promptly. Showering within two hours of coming indoors helps wash off unattached ticks and makes it easier to spot any that may have latched on.
2. Dry your clothes on high heat. In CDC experiments involving more than 1,000 lab-raised ticks, researchers determined the best way to get ticks off clothing is to dry your clothes for at least six minutes on high heat. Cold and medium temperature water will not kill ticks.
3. Do a full-body check. Ticks can latch on anywhere on the skin, but most often attach to your thighs, arms, underarms, and legs. Be sure to check through hair and clothing as well.
4. Check a disrobing spot. A good tip is to disrobe in a dry bathtub where ticks that might fall off can be easily seen and disposed of.

Protecting Children

Children are at higher risk simply because they tend to play in grassy and wooded environments without thinking about ticks. Apply repellent for them, check their hair and scalp carefully after outdoor play, and teach older kids how to do their own tick checks. Pay special attention to behind the ears, the hairline, and behind the knees.

Protecting Your Pets

Pets, especially dogs, can also be affected by tick-borne illnesses, including Lyme disease. Dr. Petersen recommends testing pets regularly for tick-related diseases when bringing them into the veterinarian for checkups. Pets should be on an oral or topical tick prevention medication prescribed by a vet. Store-bought medications do not work against the ticks that carry Lyme disease.

Pets often bring ticks indoors — even if they have been treated with a flea and tick preventative. Ticks can jump off your pet and onto your furnishings or you. Keep your pets out of areas with high grasses, if you can. And always check them for ticks after they’ve been in grassy or wooded areas.

Because warmer days where ticks are out can occur as early as February in Iowa, it may be smart to have a pet on year-round prevention medication. For more detailed guidance on keeping dogs safe, see these tips for preventing tick-borne diseases in your dog. You might also be interested to learn about animals that naturally eat ticks, which can help reduce tick populations in your yard over time.

Yard and Property Management

Ticks thrive in tall grasses and moist environments. Make sure your yard isn’t inviting them in. Cut your grass short, remove leaf litter and brush, store woodpiles off the ground, and clean up the ground around bird feeders. Ticks also don’t like sunshine. Prune your trees and low-lying bushes to keep your lawn sunny.

What to Do If You Find a Tick in Iowa

Finding a tick on your skin is understandably alarming, but staying calm and acting quickly is the best approach. To spread disease, the tick must remain attached to your skin at least 24 to 48 hours. You can remove the tick before it does any damage.

How to Remove a Tick Safely

The CDC-recommended method is straightforward and requires only a pair of fine-tipped tweezers:

1. Grasp the tick close to the skin. Use fine-tipped tweezers to grasp the tick as close to the skin’s surface as possible.
2. Pull upward with steady pressure. Pull upward with steady, even pressure. Don’t twist or jerk the tick — this can cause the mouth-parts to break off and remain in the skin. If this happens, remove the mouth-parts with tweezers. If you are unable to remove the mouth easily with clean tweezers, leave it alone and let the skin heal.
3. Clean the bite area. After removing the tick, thoroughly clean the bite area and your hands with rubbing alcohol, an iodine scrub, or soap and water.
4. Dispose of the tick properly. Dispose of a live tick by submerging it in alcohol, placing it in a sealed bag or container, wrapping it tightly in tape, or flushing it down the toilet. Never crush a tick with your fingers.

Common Mistake: Folk remedies such as burning or coating with polish, detergent, or petroleum jelly are of no benefit and may promote transmission of pathogens. Stick to tweezers and steady pressure only.

What to Watch For After Removal

After removing a tick, monitor the bite site and your overall health for several weeks. Watch for symptoms such as fever, rash, aches, and pains, and talk to a doctor right away if you feel sick after a tick bite.

It is important to contact your healthcare provider immediately if you develop a bull’s-eye rash or develop flu-like symptoms within a month of having a tick bite or being in an area where ticks are present.

If you’re unsure about removing the tick yourself, Quick Care and Urgent Care providers are ready to help. “We can help to decrease the risk for Lyme disease following a tick bite by removing the tick and prescribing a single dose of an antibiotic, treat Lyme disease by prescribing a full course of antibiotics, and/or order laboratory testing to confirm the diagnosis of Lyme disease if needed.”

You can also take a photo of the tick or save it in a sealed bag for identification purposes — this can be helpful information for your healthcare provider. Iowa State University offers tick and insect identification services if you need help identifying the species.

Reporting Tick Bites and Tick-Borne Illness in Iowa

If you develop symptoms after a tick bite, seeing a healthcare provider is the critical first step — but reporting your illness also plays an important role in Iowa’s public health tracking system.

Tick-borne and mosquito-borne disease is reportable to the Iowa Department of Health and Human Services (HHS) by Iowa Administrative Code 641 Chapter 1. This means that when you’re diagnosed with a tick-borne illness, your healthcare provider is required to report it to the state. Potential cases are reported to HHS by health care providers and diagnostic laboratories. People in Iowa need to see a health care provider and be diagnosed with a tick-borne disease to be considered a case.

This data matters. Tracking tick-borne and mosquito-borne diseases involves collecting data about the number of confirmed and probable cases of disease, including the numbers by year, sex, or age group in Iowa; whether a segment of the population is at higher risk; and how disease incidence is changing over time — all to provide information to the public about tick-borne diseases in Iowa.

What information should you share with your doctor? If you were bitten by a tick or saw a tick crawling on your skin, if you recently traveled within or outside of Iowa, and what outdoor activities you participated in either around home or while traveling — such as hiking, camping, or hunting — a doctor may use this information to decide if you need testing for a tick-borne disease.

Key Insight: Underreporting is a real issue with tick-borne illnesses in Iowa. Many people are bitten by ticks and contract Lyme disease but never report symptoms. If you feel ill after a tick bite — even mildly — seeing a doctor and getting a formal diagnosis helps protect both you and your community by contributing to accurate public health data.

Iowa’s tick-related emergency department visits have been rising. From 2017 to 2023, tick bites accounted for about 30 to 50 emergency department visits per 100,000 in the Midwest. That number has climbed to 85 per 100,000 visits — more than doubling the previous average, according to Dr. Kathryn R. Dalton at the University of Iowa’s College of Public Health. Warmer winters, fueled by climate change, may be one factor behind the spike.

The Iowa Department of Health and Human Services maintains an active tick-borne disease surveillance page where you can find current data, disease summaries, and resources for healthcare providers and the public. The CDC’s tick information hub is also a reliable source for national guidance on identification, removal, and disease prevention.

Tick season in Iowa is a real and growing concern, but it’s one you can navigate confidently with the right knowledge. Stay consistent with your prevention habits from March through November, do thorough tick checks after every outdoor outing, and don’t hesitate to contact a healthcare provider if anything feels off after a potential exposure. Whether you’re out in the field during hunting season or just enjoying a walk through an Iowa state park, a few simple precautions go a long way toward keeping your family safe all season long.