Sumas (soo-MAS) is a city in Whatcom County, Washington, United States. It had a population of 1,307 as of the 2010 census. Take a look below for 10 fun and amazing facts about Sumas, Washington, United States.

1. Sumas is located adjacent to the Canada–U.S. border and borders the city of Abbotsford, British Columbia.

2. The Sumas-Huntingdon port of entry at the north end of State Route 9 operates 24 hours a day.

3. Sumas shares Nooksack Valley School District with the cities of Nooksack and Everson.

4. It is the northernmost settlement on Washington State Route 9.

5. Sumas was officially incorporated on June 18, 1891.

6. A post office with that name has been in operation since 1897.

7. The community was named after the Sumas First Nation.

8. Sumas is located at 48°59′50″N 122°15′56″W (48.997278, -122.265522).

9. According to the United States Census Bureau, the city has a total area of 1.48 square miles (3.83 km2), all of it land.

10. Due to a surveying error, part of Sumas lies above the 49th parallel and is thus the northernmost incorporated place in the contiguous United States.