Union Gap is a city located in Washington. With a 2020 population of 6,272, it is the 116th largest city in Washington and the 4213th largest city in the United States. Union Gap is currently growing at a rate of 0.58% annually and its population has increased by 3.72% since the most recent census, which recorded a population of 6,047 in 2010. Union Gap reached it's highest population of 6,272 in 2021. Spanning over 6 miles, Union Gap has a population density of 1,123 people per square mile.
The average household income in Union Gap is $50,979 with a poverty rate of 25.89%. The median rental costs in recent years comes to $868 per month, and the median house value is $107,800. The median age in Union Gap is 34 years, 32.9 years for males, and 35.4 years for females. For every 100 females there are 103.2 males.