Pleasant Hill, PA has a population of 2,648 and is the 9,476th largest city in the United States. The population density is 3,557 per sq mi which is 1184% higher than the Pennsylvania average and 3827% higher than the national average. The median age in Pleasant Hill is 32 which is approximately 22% lower than the Pennsylvania average of 41. In Pleasant Hill, 49% of the population over 15 years of age are married, 74% speak English and 17% speak Spanish. 67% of Pleasant Hill residents were born in Pennsylvania, 19% were born out of state, 6% were born outside of the United States and 8% were foreign born.