Peeples Valley (Yavapai: Wachinivo) is a census-designated place (CDP) in Yavapai County, Arizona, United States. The population was 374 at the 2000 census.

Peeples Valley is named for prospector A. H. Peeples, who was the leader of the group that discovered Rich Hill, a gold deposit at Weaver, Arizona, in 1863.

According to the United States Census Bureau, the CDP has a total area of 15.0 square miles (39 km²), all land.

A post office in Peeples Valley opened circa 1927, and moved to Yarnell Heights in 1929 while retaining its name.

It is in the Yarnell Elementary School District, which operates Model Creek School.

After the 8th grade, students move on to Prescott High School of the Prescott Unified School District. Previously students could choose between that school and Wickenburg High School of the Wickenburg Unified School District, but in order to reduce taxes, the district board removed the Wickenburg option in November 2018.

For a period of time the Peeples Valley School District sent students to the Yarnell district, as the former did not operate any schools. On July 1, 1980, the Yarnell district absorbed the Peeples Valley district.

As of the census of 2000, there were 374 people, 176 households, and 127 families residing in the CDP. The population density was 24.9 inhabitants per square mile (9.6/km²). There were 230 housing units at an average density of 15.3 per square mile (5.9/km²). The racial makeup of the CDP was 91.4% White, 1.1% Black or African American, 1.1% Native American, 0.3% Asian, 2.7% from other races, and 3.5% from two or more races. 5.4% of the population were Hispanic or Latino of any race.