Union is a city located in Missouri. With a 2020 population of 12,211, it is the 62nd largest city in Missouri and the 2682nd largest city in the United States. Union is currently growing at a rate of 2.07% annually and its population has increased by 19.67% since the most recent census, which recorded a population of 10,204 in 2010. Spanning over 9 miles, Union has a population density of 1,343 people per square mile.
The average household income in Union is $61,708 with a poverty rate of 11.14%. The median rental costs in recent years comes to $743 per month, and the median house value is $143,900. The median age in Union is 34 years, 32.3 years for males, and 35.5 years for females. For every 100 females there are 96.6 males.