Castine (/kæsˈtiːn/ kas-TEEN) is a town in Hancock County in eastern Maine. The population was 1,320 at the 2020 census. Castine is the home of Maine Maritime Academy, a four-year institution that graduates officers and engineers for the United States Merchant Marine and marine related industries. Approximately 1000 students are enrolled. During the French colonial period, Castine was the southern tip of Acadia and served as the regional capital between 1670 and 1674.