Claysburg, PA has a population of 1,704 and is the 11,960th largest city in the United States. The population density is 663 per sq mi which is 139% higher than the Pennsylvania average and 631% higher than the national average. The median age in Claysburg is 29 which is approximately 29% lower than the Pennsylvania average of 41. In Claysburg, 66% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 89% of Claysburg residents were born in Pennsylvania, 11% were born out of state, 0% were born outside of the United States and 0% were foreign born.