Can You Own a Python in Massachusetts? What State and Federal Law Say

If you’re wondering whether you can own a python in Massachusetts, the short answer is yes for most species — but the rules are layered across state and federal law in ways that trip up a lot of first-time reptile owners. Massachusetts takes an unusual approach compared to many states: instead of publishing a list of banned animals, it publishes a list of what you’re allowed to keep, and everything else is presumed illegal without a permit.

That structure means a ball python bought from a local breeder might be perfectly legal to bring home tomorrow, while a similar-looking snake bought from an out-of-state seller could run into federal import restrictions before it even reaches you. Here’s how state and federal rules actually apply to python ownership in Massachusetts, which species carry extra restrictions, and what happens if you get it wrong.

Is It Legal to Own a Python in Massachusetts

Massachusetts regulates wildlife ownership through state snake and reptile law built around a single statute: M.G.L. c. 131, § 23. Under this law, private possession of wild and exotic animals is generally prohibited unless the owner obtains a license from the Massachusetts Division of Fisheries and Wildlife (MassWildlife), and that license is only granted for certain scientific, educational, commercial, or other specific reasons, and is not issued for keeping a wild animal as a pet.

Pythons avoid that trap because of a separate regulation, 321 CMR 9.01, which carves out an exemption list of species that can be kept without any state permit at all. Animals added to this license-exemption list include boas and pythons, skinks, parrots, hedgehogs, chinchillas, and flying squirrels, among others. More specifically, the regulation states that all species of boas and pythons (family Boidae) may be kept without a permit, with a narrow set of exceptions carved out for species that are separately protected.

In practice, this means a Massachusetts resident can legally buy, sell, breed, or keep the vast majority of python species without ever filing paperwork with the state. The exemption doesn’t erase every layer of law, though — permits for wild animals are issued only for scientific, educational, commercial, or other specific reasons, and 321 CMR 2.12 covers those regulations in full. Federal law and your town’s local bylaws can still apply even when the state itself waves you through.

Pro Tip: Before buying any snake in Massachusetts, confirm the exact species name with the seller. “Rock python” or “carpet python” can refer to multiple species with different legal statuses, and a misidentified snake can create problems you didn’t sign up for.

Federal Law: The Lacey Act and “Injurious” Python Species

Even when a python is legal to own under Massachusetts law, federal rules can restrict how it gets to you or where it can travel. The Lacey Act allows the U.S. Fish and Wildlife Service (USFWS) to designate certain non-native species as “injurious wildlife,” which restricts their import into the country and their transport across state lines.

In January 2012, USFWS finalized a rule adding four large constrictor snakes to that injurious list. On January 23, 2012, USFWS published a final rule in the Federal Register to list Burmese (and Indian) pythons, Northern African pythons, Southern African pythons, and yellow anacondas as injurious wildlife under the Lacey Act. Three years later, the agency expanded the list further. The reticulated python, DeSchauensee’s anaconda, green anaconda, and Beni anaconda were added in a 2015 rule, joining the Burmese python, yellow anaconda, and the northern and southern African pythons that had been listed as injurious in 2012.

What “injurious” actually restricts is narrower than many owners assume. The 2012 rule prohibited the importation into the United States and interstate transportation of any live animal, gamete, viable egg, or hybrid of the listed constrictor snakes, except by permit for zoological, education, medical, or scientific purposes. It does not ban owning a python you already have within your home state, and it doesn’t override a state’s own exemption rules — but it does mean you generally can’t legally have a Burmese or reticulated python shipped to you from a breeder in another state, and moving with one across state lines can require a federal permit.

The underlying reason for the listing ties directly into invasive species concerns familiar to anyone following Everglades wildlife news. Regulators used a similar risk-based framework when reviewing other invasive species that threaten local ecosystems, weighing ecological damage against the benefits of continued private ownership before deciding to restrict trade.

Which Python Species Are Restricted or Banned in Massachusetts

Most pet-trade pythons fall under the state’s blanket exemption for the family Boidae, but a few species carry extra weight because of their conservation status or their inclusion on the federal injurious list. The Burmese python (Python bivittatus) is the clearest example: it’s exempt from Massachusetts permitting requirements as a member of the python family, yet it’s also one of the four species federally listed as injurious wildlife, which limits how it can be imported or moved between states.

Ball pythons (Python regius) remain one of the most straightforward choices for Massachusetts owners — they’re not federally restricted and fall squarely within the state’s exemption. Green tree pythons (Morelia viridis) are also specifically confirmed as legal to keep as pets in the state. Green tree pythons and emerald tree boas can be kept as pets in Massachusetts, reflecting the same general exemption that covers most non-venomous constrictors.

The main carve-out to watch for is the Indian python (Python molurus molurus), a subspecies with federal endangered status that falls under Massachusetts’s categorical non-exemptions. Because no species listed under the U.S. Endangered Species Act, the IUCN Red List, or the Massachusetts list of endangered, threatened, and special concern species may be exempted, an Indian python doesn’t qualify for the automatic pet exemption that covers most other pythons, and a state permit — difficult to obtain for a pet purpose — would technically be required.

Python Type	Massachusetts State Status	Federal (Lacey Act) Status
Ball python	Exempt, no permit needed	Not listed as injurious
Burmese python	Exempt, no permit needed	Injurious since 2012
Reticulated python	Exempt, no permit needed	Injurious since 2015
Northern/Southern African python	Exempt, no permit needed	Injurious since 2012
Green tree python	Exempt, no permit needed	Not listed as injurious
Indian python	Permit required (endangered species carve-out)	Covered under Burmese python listing

Compare that to Massachusetts’s approach to venomous animals and snakes in the state, which sit on the opposite end of the permitting scale. All venomous snakes require a permit regardless of species, while the non-venomous constrictors most people picture when they think of pet pythons are exempt by default.

Permit Requirements for Owning a Python in Massachusetts

For the majority of python owners, the good news is simple: no permit is required at all. Because pythons fall under the 321 CMR 9.01 exemption list, MassWildlife doesn’t require an application, inspection, or fee before you bring home a ball python, Burmese python, or most other common species sold in the pet trade.

That changes if your snake falls into one of the categorical non-exemptions — most commonly an endangered subspecies like the Indian python. In that case, you’d need to apply through MassWildlife under the same framework used for other regulated wildlife. Permits in this category are issued only for certain scientific, educational, commercial, or other specific reasons, you must show you’re actively engaged in the activity for which you’re applying, and you will not be issued a permit for keeping a wild animal as a pet. In effect, that makes legal pet ownership of a permit-only python species close to impossible for an average household.

This mirrors how Massachusetts handles other specialized wildlife permits, such as the falconry-style licensing required to keep native raptors like the hawks found throughout the state — permits exist, but they’re narrowly scoped toward research, education, or professional activity rather than casual ownership.

Important Note: Even for exempt python species, MassWildlife notes that listing on the exemption list doesn’t override other applicable licensing requirements under federal, state, or local law. Always check whether your specific species or circumstances trigger a separate rule before assuming you’re fully in the clear.

Size and Length Restrictions in Massachusetts

Unlike some states that draw a legal line based on adult length — often treating snakes capable of exceeding a certain size as inherently more restricted — Massachusetts’s exemption list doesn’t set a specific maximum length for pet pythons. The state’s framework is built around species identity and conservation status, not adult size, so a Burmese python capable of reaching 15 to 20 feet is regulated the same way as a much smaller species, at least at the state level.

Size still matters for a different reason: it’s exactly what drove federal regulators to focus on this group of snakes in the first place. Wildlife agencies commissioned a scientific risk assessment before expanding the Lacey Act’s injurious species list, and of nine large constrictor snakes assessed, five were shown to pose a high risk to ecosystem health, including the Burmese python, Northern African python, Southern African python, yellow anaconda, and boa constrictor, while the remaining four large constrictors posed a medium risk. Species capable of growing to enormous adult sizes and surviving in warm, wet climates were judged more likely to establish invasive populations if released or escaped — which is a very different concern from Massachusetts’s own permitting criteria.

Practically speaking, prospective owners should treat adult size as a housing and husbandry issue rather than a legal one in Massachusetts. A python that starts as a two-foot hatchling can outgrow a standard enclosure within a few years, and towns without explicit exotic-animal bylaws may still apply general nuisance or public-safety ordinances if a large snake’s housing becomes a documented hazard.

Local Ordinances That May Apply in Massachusetts

State exemption doesn’t guarantee a green light everywhere in Massachusetts. Exempt species that may be kept as pets include certain boas and pythons, snapping turtles, toucans, hedgehogs, and chinchillas, but other local, state, and federal licensing laws may still apply, and exempt animals must still comply with them. Cities and towns retain authority to pass their own animal control bylaws, and some municipalities have adopted stricter rules for large or potentially dangerous animals than the state requires.

This layered structure isn’t unique to reptiles — Massachusetts communities regulate other animal ownership issues locally too, from breed-specific dog ordinances to municipal leash and containment requirements. The same logic applies to exotic pets: a python that’s perfectly legal under state law could still require a local permit, a home inspection, or a caging standard if your city or town has passed its own ordinance addressing exotic or “wild” animals kept within municipal limits.

• Contact your town or city clerk’s office before acquiring a python, especially a larger species like a Burmese or reticulated python.
• Ask specifically about animal control bylaws, not just standard pet licensing, since exotic species are often handled separately from dogs and cats.
• Check condo, co-op, or rental lease agreements separately — landlords can prohibit exotic pets even when local and state law allow them.

Penalties for Illegally Owning a Python in Massachusetts

Massachusetts enforces its wildlife possession laws through the Massachusetts Environmental Police, working alongside MassWildlife. When someone is found keeping a restricted species without the required permit, the animal itself is typically the first thing at risk. In one documented case involving an illegally kept alligator, officials suspected the reptile had been kept illegally as a pet and then dumped after it grew larger and more aggressive, and the Massachusetts Environmental Police took possession of the animal before it was later given to a properly licensed nonprofit organization.

Beyond confiscation, owners who violate M.G.L. c. 131, § 23 by keeping a permit-only species without authorization can face citations and criminal penalties under the statute’s enforcement provisions. Massachusetts bans private possession of exotic pets and requires licenses for those who deal and propagate wild species for other reasons, with the Division of Fisheries and Wildlife issuing the exemption list for species that don’t need a permit. Falling outside both the exemption list and a valid permit puts an owner squarely in violation of state law, regardless of intent.

Pro Tip: If you’re unsure whether your python qualifies for the state exemption, contact MassWildlife’s Division of Fisheries and Wildlife directly before a problem arises rather than after an inspection or complaint. Voluntary compliance is almost always treated more favorably than after-the-fact enforcement.

For most Massachusetts residents, owning a python comes down to two simple checks: confirm the species isn’t on the short list of federally injurious or state-protected snakes, and confirm your city or town hasn’t layered on its own restrictions. Get those two things right, and keeping a ball python, Burmese python, or green tree python in Massachusetts is generally straightforward — no state permit, no MassWildlife application, and no legal gray area to worry about.