Mattawa is an incorporated city in Grant County, Washington, United States. The population was 4,437 at the 2010 census. Take a look below for our list of 10 fun and interesting facts about Mattawa, Washington, United States.

1. The town of Mattawa was originally platted in 1909 by E. and Eva Campbell, but was not incorporated at that time.

2. With the construction of nearby Priest Rapids Dam and Wanapum Dam, the town boomed with construction workers.

3. Mattawa was officially incorporated on June 3, 1958.

4. The Port of Mattawa was also established in 1958.

5. Mattawa is also home to the first straw bale library in the United States.

6. On December 3, 2009, the City of Mattawa became a non-charter code city.

7. According to the United States Census Bureau, the town has a total area of 0.74 square miles (1.92 km2), all of it land.

8. A place called Mattawa is mentioned in the Hank Snow adaptation of the Geoff Mack song “I’ve Been Everywhere”, which was later covered by more than 130 artists including Johnny Cash.

9. A power plant in Mattawa is the setting for the ending of the first-season episode “E.B.E.” of the TV show The X-Files.

10. As of the census of 2000, there were 2,609 people, 495 households, and 438 families residing in the town. The population density was 5,281.7 people per square mile (2,055.8/km2). There were 576 housing units at an average density of 1,166.1 per square mile (453.9/km2). The racial makeup of the town was 29.59% White, 0.19% African American, 0.54% Native American, 0.92% Asian, 65.85% from other races, and 2.91% from two or more races. Hispanic or Latino of any race were 89.80% of the population.