Bristol, PA has a population of 9,593 and is the 4,060th largest city in the United States. The population density is 5,642 per sq mi which is 1936% higher than the Pennsylvania average and 6127% higher than the national average. The median age in Bristol is 39 which is approximately 5% lower than the Pennsylvania average of 41. In Bristol, 47% of the population over 15 years of age are married, 89% speak English and 10% speak Spanish. 76% of Bristol residents were born in Pennsylvania, 18% were born out of state, 4% were born outside of the United States and 2% were foreign born.