The population count of Nez Perce County, ID was 40,155 in 2018. The population count of Ravalli County, MT was 41,902 in 2018. The population count of Walla Walla County, WA was 60,236 in 2018.
Population
Population Change
Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API -