Arnot, PA has a population of 468 and is the 19,932nd largest city in the United States. The population density is 456 per sq mi which is 65% higher than the Pennsylvania average and 403% higher than the national average. The median age in Arnot is 45 which is approximately 12% higher than the Pennsylvania average of 41. In Arnot, 61% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 84% of Arnot residents were born in Pennsylvania, 15% were born out of state, 0% were born outside of the United States and 0% were foreign born.