Union is a city located in South Carolina. With a 2020 population of 7,630, it is the 48th largest city in South Carolina and the 3736th largest city in the United States. Union is currently declining at a rate of -0.87% annually and its population has decreased by -9.09% since the most recent census, which recorded a population of 8,393 in 2010. Union reached it's highest population of 10,775 in 1970. Spanning over 8 miles, Union has a population density of 956 people per square mile.
The average household income in Union is $42,989 with a poverty rate of 36.04%. The median rental costs in recent years comes to $630 per month, and the median house value is $76,100. The median age in Union is 40.5 years, 34.1 years for males, and 45.4 years for females. For every 100 females there are 87.2 males.