Mount Vista is a census-designated place (CDP) in Clark County, Washington, United States.

[citation needed] Mount Vista is located in southwestern Clark County.

The area is bordered to the west by Interstate 5, to the southwest by the community of Salmon Creek, and to the southeast by Barberton.

According to the United States Census Bureau, the Mount Vista CDP has a total area of 5.3 square miles (13.6 km2), all of it land.

21.9% were of German, 11.7% English, 9.4% American, 7.0% Norwegian and 5.5% Irish ancestry according to Census 2000.