The population of Seattle, Washington, is estimated to be around 725,487 in 2023. The Seattle metropolitan area, which includes the surrounding cities, has a population of approximately 4.02 million, making it the 15th largest in the United States. Additionally, the current metro area population of Seattle in 2023 is 3,519,000, showing a 0.86% increase from 2022. In 2021, the population of the Seattle-Tacoma-Bellevue metropolitan area in the United States was about 4.01 million people.