Caln, PA has a population of 1,570 and is the 12,431st largest city in the United States. The population density is 1,954 per sq mi which is 605% higher than the Pennsylvania average and 2056% higher than the national average. The median age in Caln is 29 which is approximately 30% lower than the Pennsylvania average of 41. In Caln, 59% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 80% of Caln residents were born in Pennsylvania, 12% were born out of state, 2% were born outside of the United States and 6% were foreign born.