Williamstown, MA

• Rabies vaccination requirement
  Rule: MGL c.140 s.145B: each owner or keeper of a dog, cat or ferret 6 months of age or older shall have it vaccinated against rabies by a licensed veterinarian and revaccinated at intervals recommended by the vaccine manufacturer; unvaccinated animals acquired or moved into the commonwealth must be vaccinated within 30 days after acquisition/arrival or on reaching 6 months, whichever is later. The veterinarian issues a certificate and a tag; dogs wear the tag on a collar or harness (cat/ferret owners may keep the tag available for inspection instead). Proof of current vaccination is required for acceptance at an animal hospital, veterinarian's office or boarding facility. Fine up to $100.

  Scope: state

  Statute url: https://malegislature.gov/Laws/GeneralLaws/PartI/TitleXX/Chapter140/Section145B

  Applies statewide (Massachusetts). Source: Massachusetts General Laws c.140 s.145B - Vaccination against rabies · Checked Nov 6, 2026

About this place

• Land area (sq mi)
  3.398 (2025)

  Source: U.S. Census Bureau, 2025 Gazetteer Files (places) · Checked Nov 5, 2026