Kempton, PA has a population of 114 and is the 26,571st largest city in the United States. The population density is 144 per sq mi which is 48% lower than the Pennsylvania average and 59% higher than the national average. The median age in Kempton is 50 which is approximately 22% higher than the Pennsylvania average of 41. In Kempton, 71% of the population over 15 years of age are married, 88% speak English and 0% speak Spanish. 72% of Kempton residents were born in Pennsylvania, 28% were born out of state, 0% were born outside of the United States and 0% were foreign born.