Lumberton, NC has a population of 21,646 and is the 2,012th largest city in the United States. The population density is 1,210 per sq mi which is 568% higher than the North Carolina average and 1235% higher than the national average. The median age in Lumberton is 34 which is approximately 12% lower than the North Carolina average of 38. In Lumberton, 47% of the population over 15 years of age are married, 90% speak English and 8% speak Spanish. 75% of Lumberton residents were born in North Carolina, 17% were born out of state, 1% were born outside of the United States and 7% were foreign born.