Washington Counties by Population

The most populated counties in Washington are King County with 2,271,380, Pierce County at 928,696, Snohomish County with 844,761, Spokane County at 551,455, and Clark County with 521,150. You can get the most current Census population data for all 39 Washington counties, sorted from the most populous counties in Washington to the least, according to the 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Washington counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!