Marion is a city located in South Carolina. With a 2020 population of 6,211, it is the 56th largest city in South Carolina and the 4210th largest city in the United States. Marion is currently declining at a rate of -1.71% annually and its population has decreased by -10.49% since the most recent census, which recorded a population of 6,939 in 2010. Marion reached it's highest population of 7,700 in 1980. Spanning over 4 miles, Marion has a population density of 1,405 people per square mile.
The average household income in Marion is $47,698 with a poverty rate of 32.12%. The median rental costs in recent years comes to $536 per month, and the median house value is $104,000. The median age in Marion is 36.6 years, 38.8 years for males, and 35.3 years for females. For every 100 females there are 78.0 males.