Finley is a census-designated place (CDP) in Benton County, Washington, United States. The population was 6,012 at the 2010 census. It is located to the southeast of the larger city of Kennewick.

A say office called Finley was usual in 1906, and remained in operation until 1935. The community was named after George E. Finley, a trailblazer settler.

Finley is located at 46°10′32″N 119°3′26″W / 46.17556°N 119.05722°W / 46.17556; -119.05722 (46.175660, -119.057361).

According to the United States Census Bureau, the CDP has a total area of 14.6 square miles (37.7 km²), of which, 11.5 square miles (29.8 km²) of it is land and 3.0 square miles (7.9 km²) of it (20.88%) is water.

As of the census of 2000, there were 5,770 people, 1,987 households, and 1,585 families residing in the CDP. The population density was 501.2 people per square mile (193.6/km²). There were 2,082 housing units at an average density of 180.8/sq mi (69.8/km²). The racial makeup of the CDP was 91.40% White, 0.03% African American, 1.11% Native American, 0.24% Asian, 0.12% Pacific Islander, 4.71% from additional races, and 2.37% from two or more races. Hispanic or Latino of any race were 8.99% of the population.