which canadian province forms part of the eastern border of maine

The Canadian province that forms part of the eastern border of Maine is New Brunswick.

Border overview

Maine shares land borders with two Canadian provinces: New Brunswick to the northeast and east, and Quebec to the northwest. The portion that lies along Maine’s eastern side—toward the Atlantic and the Bay of Fundy—is with New Brunswick , not Quebec.

Extra geographic context

Maine’s border with New Brunswick runs roughly from the coastline near the Bay of Fundy northward along rivers and lakes before turning inland. This helps define Maine as the northeasternmost U.S. state, with New Brunswick directly across much of its eastern boundary.

Information gathered from public forums or data available on the internet and portrayed here.