Washington’s population grew by 158,100 people since the 2020 decennial census April 1, 2020, largely due to migration. This means Washington grew to an estimated 7,864,400 people as of April 1, according to annual estimates that the Office of Financial Management prepared.

The state’s total population change was 97,400 since last year, which fell just below the last decade average of 98,200 per year. King County is the main contributor of that growth, adding 30,700 people this year, compared to an average of 33,800 people per year between 2010 and 2020.

Washington’s population growth steadily increased by 61,600 people in 2021, launching the state into one of the most unique population estimate years because of delayed census data and COVID-19 impacts. As of April 1, 2021, Washington now tops 7,766,925 residents, with most of the growth concentrated in larger cities across the state.

An estimated 7,656,200 people resided in Washington state as of April 1, according to annual estimates prepared by the Office of Financial Management. The COVID-19 crisis did not have a discernible impact on the 2020 estimates because most population change occurred before the crisis began. Strong population growth continued in Washington, with the state adding 109,800 people over the last year, a 1.5% increase. Migration continues to be the primary driver behind Washington’s population growth.