Walnut Grove, Washington
Place
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.Based on per capita income, one of the more reliable measures of affluence, Walnut Grove ranks 78th of 522 areas in the state of Washington to be ranked.