Erwin, NC has a population of 4,774 and is the 6,669th largest city in the United States. The population density is 1,130 per sq mi which is 524% higher than the North Carolina average and 1147% higher than the national average. The median age in Erwin is 43 which is approximately 13% higher than the North Carolina average of 38. In Erwin, 55% of the population over 15 years of age are married, 91% speak English and 8% speak Spanish. 75% of Erwin residents were born in North Carolina, 17% were born out of state, 2% were born outside of the United States and 6% were foreign born.