New Bethlehem, PA has a population of 990 and is the 15,235th largest city in the United States. The population density is 2,123 per sq mi which is 666% higher than the Pennsylvania average and 2244% higher than the national average. The median age in New Bethlehem is 47 which is approximately 17% higher than the Pennsylvania average of 41. In New Bethlehem, 65% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 87% of New Bethlehem residents were born in Pennsylvania, 12% were born out of state, 0% were born outside of the United States and 0% were foreign born.