Rocky Mount, NC has a population of 56,175 and is the 711th largest city in the United States. The population density is 1,273 per sq mi which is 484% higher than the North Carolina average and 1305% higher than the national average. The median age in Rocky Mount is 37 which is approximately 3% lower than the North Carolina average of 38. In Rocky Mount, 48% of the population over 15 years of age are married, 95% speak English and 3% speak Spanish. 74% of Rocky Mount residents were born in North Carolina, 21% were born out of state, 0% were born outside of the United States and 4% were foreign born.