Glenshaw, PA has a population of 8,792 and is the 4,342nd largest city in the United States. The population density is 2,812 per sq mi which is 915% higher than the Pennsylvania average and 3004% higher than the national average. The median age in Glenshaw is 46 which is approximately 13% higher than the Pennsylvania average of 41. In Glenshaw, 73% of the population over 15 years of age are married, 93% speak English and 2% speak Spanish. 85% of Glenshaw residents were born in Pennsylvania, 11% were born out of state, 0% were born outside of the United States and 3% were foreign born.