Atlas, PA has a population of 892 and is the 15,863rd largest city in the United States. The population density is 3,564 per sq mi which is 1186% higher than the Pennsylvania average and 3834% higher than the national average. The median age in Atlas is 57 which is approximately 40% higher than the Pennsylvania average of 41. In Atlas, 47% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 94% of Atlas residents were born in Pennsylvania, 5% were born out of state, 0% were born outside of the United States and 1% were foreign born.