It depends on the island.

Yes, generally small dogs on a leash are allowed on most inhabited islands, but there are exceptions — especially in national parks, nature reserves, and certain public beaches. You need to check the specific island’s rules.

Some islands have strict off-leash bans, even for small dogs. Others (like parts of the Hawaiian islands) require dogs to be leashed at all times in state parks but allow them on designated trails. A few islands — Mackinac Island in Michigan, for example — let you bring dogs pretty much everywhere on leash as long as you clean up. Then you have places like the Channel Islands off California, which are basically no-dog zones because of wildlife protection.

If you’re planning a trip, the safest move is to look up the island’s official tourism or parks website. Or call the local visitor center. “Are dogs allowed?” is a common question, and they’ll tell you straight up.

Don’t assume because it’s a tourist island it’s dog-friendly. Some of the most popular ones are surprisingly strict.