- Bellingham (/ˈbɛlɪŋhæm/ BEL-ing-ham) is the most populous city in, and county seat of Whatcom County in the U.S. state of Washington. It lies 21 miles (34 km) south of the U.S.–Canada border and in between Vancouver, British Columbia (located 52 miles (84 km) to the northwest) and Seattle (90 miles (140 km) to the south).
