Sunnyside is a city located in Yakima County Washington. With a 2020 population of 17,002, it is the 63rd largest city in Washington and the 2128th largest city in the United States . Sunnyside is currently growing at a rate of 0.61% annually and its population has increased by 7.21% since the most recent census, which recorded a population of 15,858 in 2010. Sunnyside reached it's highest population of 17,002 in 2021. Spanning over 8 miles, Sunnyside has a population density of 2,254 people per square mile.
The average household income in Sunnyside is $56,681 with a poverty rate of 22.57%. The median rental costs in recent years comes to $722 per month, and the median house value is $129,400. The median age in Sunnyside is 25.4 years, 22.4 years for males, and 29.4 years for females.