Marion, NC has a population of 7,873 and is the 4,759th largest city in the United States. The population density is 1,369 per sq mi which is 656% higher than the North Carolina average and 1411% higher than the national average. The median age in Marion is 37 which is approximately 3% lower than the North Carolina average of 38. In Marion, 51% of the population over 15 years of age are married, 83% speak English and 16% speak Spanish. 71% of Marion residents were born in North Carolina, 20% were born out of state, 0% were born outside of the United States and 8% were foreign born.