Can You Own a Boa Constrictor in Washington? What the Law Actually Allows
September 8, 2026
Most people assume any snake big enough to swallow a rabbit whole must be banned somewhere in the Pacific Northwest. Boa constrictors prove that assumption wrong. If you’re wondering whether you can own a boa constrictor in Washington, the short answer is yes at the state level, but the full picture involves three separate layers of law working together, and missing any one of them can still get you into trouble.
This guide walks through what federal regulators actually decided about boa constrictors, what Washington’s own statutes say, which permits might apply to your situation, where local ordinances fit in, and what penalties look like if something goes wrong.
Is It Legal to Own a Boa Constrictor in Washington
The boa constrictor (Boa constrictor) is a heavy-bodied, non-venomous snake native to Central and South America that has been a staple of the U.S. exotic pet trade for decades. If you’re deciding whether to bring one home, it helps to start with the boa constrictor’s natural history and care needs before worrying about paperwork.
On the legal side, Washington takes what one legal analysis describes as an exclusionary approach: rather than listing every animal you can own, the law spells out what you cannot. If a species does not appear on one of the state’s prohibited lists and is not classified as a rabies risk or invasive threat, private ownership is generally legal without a special permit.
Boa constrictors fall into that legal gap. The statute does not ban large constrictor snakes like Burmese pythons, reticulated pythons, or anacondas, and these species are regulated at the federal level in some contexts, but Washington’s dangerous wild animal law does not list them. That means a pet boa is not automatically illegal simply because of its size or species.
Important Note: Some general exotic-pet roundups claim Washington bans large constrictors outright. The actual statutory text in RCW 16.30 and WAC 220-640-200 does not list boa constrictors as a restricted species, so always check the current statute or call WDFW directly rather than relying on secondhand summaries.
Federal Restrictions on Boa Constrictors
Before looking at state rules, it helps to understand what the federal government already decided about this species. The U.S. Fish and Wildlife Service spent years reviewing whether boa constrictors and several other large snakes should be classified as “injurious wildlife” under the Lacey Act.
In 2010, the agency proposed listing nine species, including Python molurus (Burmese and Indian pythons), reticulated python, Northern African python, Southern African python, boa constrictor, yellow anaconda, DeSchauensee’s anaconda, green anaconda, and Beni anaconda as injurious wildlife. In January 2012, the Service published a final rule listing Burmese and Indian pythons, Northern African pythons, Southern African pythons, and yellow anacondas as injurious wildlife.
In 2015, the Service amended its regulations to add reticulated python, DeSchauensee’s anaconda, green anaconda, and Beni anaconda to the injurious wildlife list. The boa constrictor, notably, was left off both rounds of listings.
The boa constrictor was also considered for listing as an injurious species but was not included in this ruling, and FWS is currently allowing the pet industry to coordinate with states and FWS to voluntarily address prevention of boa constrictor release as an alternative to Lacey Act restriction. The reasoning was practical rather than ecological. The regulatory prohibitions of the Lacey Act, which are limited to importation and interstate transport, are less effective when a species like the boa constrictor is already widely held in captivity in high numbers and significant domestic breeding is occurring.
An injurious listing does not ban ownership outright; it restricts movement. Injurious species cannot be imported or transported over state lines without FWS-issued permits. Because boa constrictors were never added to that list, moving one across state lines does not carry the same federal paperwork burden as it would for a Burmese python.
| Species | Lacey Act “Injurious” Status | Year Listed |
|---|---|---|
| Burmese python | Listed | 2012 |
| Northern African python | Listed | 2012 |
| Southern African python | Listed | 2012 |
| Yellow anaconda | Listed | 2012 |
| Reticulated python | Listed | 2015 |
| Green anaconda | Listed | 2015 |
| Beni anaconda | Listed | 2015 |
| DeSchauensee’s anaconda | Listed | 2015 |
| Boa constrictor | Not listed | — |
This is worth comparing to how Washington treats another category entirely. Unlike constrictors, venomous species found in Washington face a hard state-level prohibition regardless of what federal law says, which shows how the two systems can produce very different outcomes for different animals.
Washington’s Laws on Owning a Boa Constrictor
Washington’s core exotic-animal framework runs through two separate statutes, and it’s worth knowing how each one treats large snakes. Separate from the dangerous animal ban, Washington prohibits possession of non-native species that threaten the state’s ecosystems.
The first statute, the dangerous wild animal law, defines which species count as inherently hazardous to keep as pets. The prohibited categories are broad, covering big cats, bears, primates, venomous reptiles, crocodilians, and dozens of species considered threats to native ecosystems. Large constrictor snakes are conspicuously absent from that list.
The second statute covers what regulators call deleterious exotic wildlife. WAC 220-640-200 designates specific birds, mammals, and their hybrids as “deleterious exotic wildlife,” and you cannot import, possess, breed, sell, or release any of them. That rule focuses on species like:
- Mute swans and other Anatidae-family birds
- Mongooses
- Wild boar and javelina (collared peccary) hybrids
- Non-native bovids such as Barbary sheep, tahr, and wildebeest
- Several non-native deer and cervid species
Boas do not appear on either list, which is why the species sits in a legal gray zone rather than an outright ban. For context on how Washington treats snakes that are naturally present in the state, it’s worth reading about whether coral snakes actually occur in Washington, since native-species status changes which rules apply.
Permits and Requirements for Boa Constrictor Ownership in Washington
Even though boa constrictors are not on Washington’s dangerous or deleterious lists, that does not mean zero paperwork ever applies. The most common trigger is bringing a snake into the state from somewhere else.
Wild and exotic animals entering Washington state must be accompanied by a certificate of veterinary inspection issued by an accredited veterinarian licensed in the state of origin, or an international certificate of health, unless the animals are prohibited under chapter 16.30 RCW or 232-12 WAC. All wild and exotic animals must also be accompanied by an entry permit.
The Washington Department of Fish and Wildlife (WDFW) is the agency that administers this kind of documentation, and it manages a wide range of wildlife-related permits beyond exotic pets. It’s the same agency responsible for setting the trout fishing season in Washington, which gives a sense of how broad its regulatory reach actually is.
Permits can also apply in specific situations even for species that are otherwise unregulated as pets. Permits for some species may be issued for organizations, like an animal sanctuary, and qualified individuals. If you plan to breed boas commercially, run an educational outreach program, or operate a rescue, expect additional licensing beyond simple private ownership.
Pro Tip: If you’re buying a boa constrictor from an out-of-state breeder, ask for the health certificate and entry permit paperwork before the snake ships. Sorting this out after the animal arrives is far more difficult than confirming it in advance.
Before acquiring a boa constrictor, walk through this quick sequence:
- Confirm the seller can provide a valid certificate of veterinary inspection if the animal is coming from out of state.
- Check whether you need an entry permit under WAC 16-54-180 for the transport.
- Contact your city or county animal control office to ask about local exotic-pet ordinances.
- Keep purchase records and health documentation in case ownership is ever questioned.
Local Ordinances That May Apply in Washington
State-level legality is only one layer of the puzzle. Every state has exotic animal laws which allow, restrict, or prohibit the ownership of certain types of animals, and Washington’s cities and counties are free to add their own restrictions on top of state law.
Before acquiring any unusual animal, you need to clear three separate layers of law: the state’s dangerous wild animal statute, its deleterious exotic wildlife rules, and whatever your city or county has added on top. A boa constrictor can clear the first two layers cleanly and still run into trouble at the third.
Local ordinances commonly address things state law leaves alone, such as:
- Maximum enclosure sizes or containment standards for large snakes
- Limits on the total number of exotic animals per household
- Zoning restrictions that separate residential exotic-pet keeping from commercial breeding
- Landlord or homeowners’ association rules that go beyond what any government agency requires
Common Mistake: Assuming state law is the final word. A boa constrictor that’s perfectly legal under RCW 16.30 and WAC 220-640-200 can still violate a city code, a rental lease, or an HOA covenant. Always check municipal code alongside state statute.
If you ever need to remove or relocate wildlife from your property, whether native or escaped exotic species, the process and legal responsibilities differ significantly, which is covered in more detail in the guide to wildlife removal laws in Washington.
Penalties for Illegally Owning a Boa Constrictor in Washington
Because boa constrictors are not classified as dangerous wild animals or deleterious exotic wildlife, the harshest state penalties built for those categories generally do not apply to simple pet ownership. But it’s worth understanding those penalty structures, since related violations, like falsified import paperwork or keeping a genuinely prohibited species alongside your boa, can trigger them.
Knowingly possessing, releasing, or importing any designated deleterious species is a class C felony, with a maximum sentence of five years in prison and a $10,000 fine, and the state will also pursue reimbursement for any costs it incurs dealing with the animal. That is a dramatically different consequence than what applies to species covered only by the dangerous wild animal statute.
The gap between these two penalty structures is striking: keeping a pet tiger in your backyard is a civil fine, while keeping a wild boar is a felony. A boa constrictor, sitting outside both frameworks, typically triggers civil-level consequences at most for pure possession, though local ordinance violations carry their own separate fine schedules.
Enforcement patterns for genuinely prohibited species give a useful preview of what any wildlife violation investigation can look like. If someone is found in possession of a prohibited species, wildlife officials can take several actions, including confiscating the animal, issuing fines, and potentially pursuing criminal charges. Rescue organizations also factor into the picture here: PAWS does not take in exotic animals such as parrots, hedgehogs, and boa constrictors, since these are not animals living naturally in Washington State, which means owners who can no longer keep a boa need to plan a rehoming path well before a legal or welfare crisis forces the issue.
The bottom line: a boa constrictor is not automatically illegal in Washington, but staying on the right side of the law means tracking federal transport rules, state statutes that don’t name the species directly, import documentation, and whatever your specific city or county has layered on top.