Smock, PA has a population of 599 and is the 18,438th largest city in the United States. The population density is 383 per sq mi which is 38% higher than the Pennsylvania average and 323% higher than the national average. The median age in Smock is 42 which is approximately 3% higher than the Pennsylvania average of 41. In Smock, 68% of the population over 15 years of age are married, 99% speak English and 1% speak Spanish. 88% of Smock residents were born in Pennsylvania, 10% were born out of state, 2% were born outside of the United States and 0% were foreign born.