Arlington is a city located in Washington. With a 2020 population of 22,041, it is the 49th largest city in Washington and the 1717th largest city in the United States. Arlington is currently growing at a rate of 3.57% annually and its population has increased by 22.96% since the most recent census, which recorded a population of 17,926 in 2010. Arlington reached it's highest population of 22,041 in 2021. Spanning over 10 miles, Arlington has a population density of 2,268 people per square mile.
The average household income in Arlington is $88,307 with a poverty rate of 4.97%. The median rental costs in recent years comes to $1,341 per month, and the median house value is $323,200. The median age in Arlington is 38.4 years, 37.8 years for males, and 39.1 years for females. For every 100 females there are 86.4 males.