U.S. state flag consisting of a dark blue field (background) with the state coat of arms (arms, coat of) in the centre.

Until 1820 Maine was a district of Massachusetts, and its early symbols were based on that connection. The pine tree emblem that had been adopted for the Massachusetts naval flag in April 1776 was prominently featured in the coat of arms of Maine when it became a state. Pine trees were important to the early economy of the area because of their use in the shipbuilding industry.

A flag design consisting of a pine tree and the North Star (Polaris) on a buff (light tan) background was adopted on March 21, 1901. The star was an appropriate symbol, as Maine was the northernmost state for many years. The current state flag was established in February 1909. Its coat of arms shows a moose-and-pine-tree emblem on a shield supported by a farmer and a sailor; a ribbon below bears the state name, and above is the North Star and the Latin motto “Dirigo” (“I direct”). Maine also has a special naval flag resembling that of Massachusetts; it features a white background with a green pine tree.