Catheys Valley is a census-designated place in Mariposa County, California, United States. It lies in Catheys Valley 22 miles northeast of Merced and 8 miles southwest of Mariposa, at an elevation of 1,325 feet. As of the 2020 census, Catheys Valley had a population of 829. Catheys Valley was named after Andrew Cathey, a native of North Carolina, who settled in the valley around 1850. The ZIP Code is 95306. The community is inside area code 209.