North Bellmore, NY has a population of 19,720 and is the 2,212th largest city in the United States. The population density is 7,526 per sq mi which is 1998% higher than the New York average and 8207% higher than the national average. The median age in North Bellmore is 43 which is approximately 12% higher than the New York average of 38. In North Bellmore, 66% of the population over 15 years of age are married, 86% speak English and 4% speak Spanish. 84% of North Bellmore residents were born in New York, 5% were born out of state, 1% were born outside of the United States and 10% were foreign born.