Friday Harbor is a city located in San Juan County Washington. It is also the county seat of San Juan County. With a 2020 population of 2,740, it is the 150th largest city in Washington and the 6529th largest city in the United States . Friday Harbor is currently growing at a rate of 3.36% annually and its population has increased by 26.73% since the most recent census, which recorded a population of 2,162 in 2010. Friday Harbor reached it's highest population of 2,740 in 2021. Spanning over 2 miles, Friday Harbor has a population density of 1,268 people per square mile.
The average household income in Friday Harbor is $72,113 with a poverty rate of 13.81%. The median rental costs in recent years comes to $999 per month, and the median house value is $346,000. The median age in Friday Harbor is 40.6 years, 40.5 years for males, and 40.7 years for females.