Walnut Grove is a census-designated place (CDP) in Clark County, Washington, United States. The population was 9,790 at the 2010 census, up from 7,164 at the 2000 census.
Walnut Grove is a census-designated place (CDP) in Clark County, Washington United States. The population was 9,790 at the 2010 census, up from 7,164 at the 2000 census.