Can You Own a Boa Constrictor in Massachusetts? What State Law Actually Allows

If you’re picturing a Massachusetts snake owner sneaking a boa constrictor past the law, you can put that worry aside. Boa constrictors are one of the few large exotic snakes that Massachusetts residents can legally keep, and you don’t even need a state permit to do it. But “legal” doesn’t mean “unregulated” — federal rules, state exemption criteria, and your own city or town’s ordinances can all still affect whether, and how, you keep one.

This guide walks through exactly what Massachusetts law says about owning a boa constrictor, where federal restrictions on constrictor snakes fit in, what permits (if any) you actually need, and what happens if you get the paperwork wrong.

Is It Legal to Own a Boa Constrictor in Massachusetts

Yes. The common boa constrictor (Boa constrictor) appears on Massachusetts’ exotic animal exemption list, which means residents can possess one without applying for a MassWildlife permit. This snake is a large, non-venomous constrictor native to Central and South America, and under the state’s regulatory framework it’s treated very differently than species like big cats or venomous reptiles, which remain tightly restricted. You can read more about the species itself, including its natural range and behavior, in this boa constrictor species profile.

Massachusetts’ default rule under state law is actually restrictive: Massachusetts bans private possession of exotic pets and requires licenses for those who deal and propagate wild species for other reasons, while the Massachusetts director of the Division of Fisheries and Wildlife also issues a list of exempted species for which no permit is needed. Boa constrictors made that exempt list, which is why owning one doesn’t automatically put you at odds with state wildlife law the way owning, say, an anaconda would.

Key Insight: Massachusetts treats exotic pet ownership as prohibited by default. Species are only legal to keep without a permit because the state specifically named them on its exemption list — not because exotic pets are broadly allowed.

Federal Restrictions on Boa Constrictors

Before you assume federal law mirrors state law, it’s worth knowing that boa constrictors have a unique history under the federal Lacey Act. In 2012, the U.S. Fish and Wildlife Service (FWS) took its first major step toward regulating giant constrictor snakes as invasive threats, particularly after Burmese pythons became established in the Florida Everglades.

On January 23, 2012, FWS 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. That listing meant those species could no longer be imported into the country or transported across state lines without a federal permit, since injurious species cannot be imported or transported over state lines without FWS-issued permits.

The boa constrictor was originally part of that same nine-species proposal, but it wasn’t included in the 2012 rule. FWS revisited the remaining five candidate species in a follow-up rulemaking, and the outcome for boas was different from the rest. The 2015 regulation listed the reticulated python, DeSchauensee’s anaconda, green anaconda, and Beni anaconda as injurious under the Lacey Act, and removed the boa constrictor from consideration.

Why the exception? FWS explained that the regulatory prohibitions of the Lacey Act, limited to importation and interstate transport, are less effective when a species like the boa constrictor is already widely held in captivity in the United States in large numbers, with significant domestic breeding occurring. In practical terms, that means boa constrictors can still be shipped and sold across state lines under federal law — something that is not true for the species listed as injurious.

This federal distinction matters if you ever plan to buy a boa from an out-of-state breeder or move across state lines with one. Unlike reticulated pythons or anacondas, a common boa constrictor generally doesn’t trigger the federal transport restrictions that apply to those species — though CITES-listed or endangered boa subspecies are a separate matter, covered below. For general background on how invasive reptiles are tracked in the region, see this overview of snake species found in Massachusetts.

Massachusetts’s Laws on Owning a Boa Constrictor

The core state statute is Massachusetts General Laws Chapter 131, Section 23, which gives the Division of Fisheries and Wildlife (MassWildlife) authority over who can possess wild and exotic animals. The implementing regulation, 321 CMR 9.01, is where the actual exemption list lives, and it’s the document you need to check before assuming any exotic species is legal.

Under that regulation, all species of boas and pythons in the family Boidae may be kept without a permit, except those categorically non-exempt species, and except the African Rock Python, Reticulated Python, and all species of anaconda, which require a permit. That single sentence is doing a lot of work: it confirms boa constrictors are exempt by default, while several of their large-constrictor cousins are not.

To qualify for exemption at all, a species has to satisfy four criteria that MassWildlife applies across the board. According to the agency’s own guidance, an animal or group of animals must meet all of the following:

• Accidental release will not adversely affect the ecology of Massachusetts
• The animal in captivity, or if escaped, poses no substantial danger to humans, either from injury or disease
• Proper care of the animal is no more demanding than the care of common domestic animals
• Trade in the animal has no significant adverse effect on the wild population of the animal in any of its natural habitats

Boa constrictors clear this bar largely because Massachusetts’ cold climate makes establishment in the wild unlikely, they’re not venomous, and captive care standards are well established among reptile keepers. That’s a different risk profile than, say, a reticulated python, which can exceed 20 feet and presents a much higher public-safety concern if it escapes.

There’s an important carve-out, though. No species may be exempted if it is a threatened or endangered species listed under the U.S. Endangered Species Act of 1973. Some boa subspecies and localities — certain island or CITES Appendix I populations, for example — carry endangered status separate from the common boa constrictor. If you’re buying a specific subspecies or wild-collected animal rather than a captive-bred common boa, you’ll want to verify its listing status before assuming the exemption applies. For context on how Massachusetts treats protected species generally, see this list of endangered animals in Massachusetts.

Important Note: The exemption applies to the common boa constrictor (Boa constrictor) as a species. It does not automatically extend to every boa subspecies, particularly any population listed as threatened or endangered. When in doubt, confirm the exact taxonomic status of the animal you’re purchasing.

Permits and Requirements for Boa Constrictor Ownership in Massachusetts

Because boa constrictors sit on the exemption list, you don’t need a MassWildlife possession permit to keep one as a pet in most circumstances. That puts them in a very different category from prohibited species like large cats or bears, where you will not be issued a permit for keeping a wild animal as a pet, since even permit pathways are not designed for hobbyists or pet enthusiasts.

That said, “no permit needed” comes with a few practical caveats worth knowing before you buy:

1. Dealer and commercial activity: If you plan to breed and sell boas rather than just keep one as a pet, different licensing applies. State law allows a license to possess but not to sell except under authority of a permit from the director — authority to issue such permits being granted to the director — for a reptile or amphibian, so commercial breeders and sellers face requirements that casual pet owners don’t.
2. Non-exempt relatives require a permit: If you want to keep a reticulated python, African rock python, or any anaconda species alongside your boa, those specific species require a separate MassWildlife permit even though the boa itself does not.
3. Endangered or CITES-listed animals: As noted above, any boa population or subspecies with federal endangered status falls outside the exemption entirely, regardless of how the common boa constrictor is treated.
4. Import and interstate purchases: Because the boa constrictor isn’t listed as injurious under the Lacey Act, you can generally transport one across state lines, but always confirm the seller’s own state export rules before finalizing a purchase.

Before purchasing any exotic animal, verify compliance at three levels in this order: federal law (especially for CITES-listed species), Massachusetts state law (321 CMR 9.01 and M.G.L. c. 131 § 23), and then your specific city or town ordinances. Missing any one level can result in fines or forced surrender of the animal.

You might wonder whether MassWildlife tracks boa ownership at all if no permit is required. Generally, exempt species aren’t registered the way permitted species are, but the agency retains authority to inspect and quarantine animals under certain circumstances, which is covered in the penalties section below. For a broader look at how the state handles reptile identification and native species, the Massachusetts snake guide is a useful companion resource.

Local Ordinances That May Apply in Massachusetts

State law sets the baseline, but it isn’t the final word. State law sets the floor, but local governments in Massachusetts can add restrictions that go beyond what MassWildlife requires, which means an animal that is legal under state law may still be prohibited where you live. This is a distinction a lot of prospective owners miss, and it can matter as much as the state exemption itself.

Local boards of health, municipal zoning boards, and city councils in Massachusetts have independent authority to regulate animal keeping within their borders. A town could, in theory, ban large constrictor snakes entirely, cap the number of reptiles per household, or require notification to local animal control — none of which MassWildlife would track or enforce. This layered structure is similar to how some Massachusetts municipalities handle other animal issues; local dog breed restrictions and leash law ordinances both operate on top of state-level rules in much the same way.

Before bringing a boa constrictor home, it’s worth a quick call to your local animal control office or town clerk. Rental housing and condo associations may impose their own restrictions as well, separate from any government rule, so it’s smart to check your lease or HOA documents too. Some renters run into similar layered-permission issues with more familiar animals, as outlined in this guide to Massachusetts pet and property disputes.

Penalties for Illegally Owning a Boa Constrictor in Massachusetts

Penalties in this area generally apply to two different scenarios: owning a species that isn’t exempt without a permit, and violating conditions attached to an exempt animal, such as a quarantine order. For exempt species like the common boa constrictor, most owners never encounter enforcement because they aren’t violating anything by simply keeping the animal.

The risk arises if you own a non-exempt relative — a reticulated python, an anaconda, or an endangered boa subspecies — without the required permit. That falls under the general prohibition of M.G.L. c. 131, § 23, and MassWildlife has authority to investigate unpermitted possession of non-exempt wildlife.

State regulations also give MassWildlife a specific enforcement tool even for exempt animals: no person shall liberate or cause to be liberated any exempt animal, except in accordance with a liberation permit issued pursuant to 321 CMR 2.15, and the Director may examine, quarantine, and destroy exempt animals in accordance with M.G.L. c. 131, §§ 19, 19A, 25A, and 25B, with the penalty for violating such a quarantine order provided under M.G.L. c. 131, § 25C.