New Britain, PA has a population of 3,025 and is the 8,777th largest city in the United States. The population density is 2,506 per sq mi which is 804% higher than the Pennsylvania average and 2666% higher than the national average. The median age in New Britain is 30 which is approximately 26% lower than the Pennsylvania average of 41. In New Britain, 43% of the population over 15 years of age are married, 93% speak English and 1% speak Spanish. 70% of New Britain residents were born in Pennsylvania, 22% were born out of state, 0% were born outside of the United States and 8% were foreign born.