Mountlake Terrace is a city located in Washington. With a 2020 population of 21,896, it is the 53rd largest city in Washington and the 1719th largest city in the United States. Mountlake Terrace is currently growing at a rate of 1.10% annually and its population has increased by 9.98% since the most recent census, which recorded a population of 19,909 in 2010. Spanning over 4 miles, Mountlake Terrace has a population density of 5,398 people per square mile.
The average household income in Mountlake Terrace is $86,303 with a poverty rate of 6.89%. The median rental costs in recent years comes to $1,402 per month, and the median house value is $352,700. The median age in Mountlake Terrace is 37.1 years, 36.1 years for males, and 38.4 years for females. For every 100 females there are 95.3 males.