Walnut Creek, NC has a population of 936 and is the 15,543rd largest city in the United States. The population density is 440 per sq mi which is 143% higher than the North Carolina average and 386% higher than the national average. The median age in Walnut Creek is 51 which is approximately 32% higher than the North Carolina average of 38. In Walnut Creek, 70% of the population over 15 years of age are married, 97% speak English and 1% speak Spanish. 56% of Walnut Creek residents were born in North Carolina, 41% were born out of state, 2% were born outside of the United States and 1% were foreign born.