Lake Arthur Estates, PA has a population of 606 and is the 18,380th largest city in the United States. The population density is 914 per sq mi which is 230% higher than the Pennsylvania average and 909% higher than the national average. The median age in Lake Arthur Estates is 49 which is approximately 19% higher than the Pennsylvania average of 41. In Lake Arthur Estates, 54% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 80% of Lake Arthur Estates residents were born in Pennsylvania, 20% were born out of state, 0% were born outside of the United States and 0% were foreign born.