Glasgow, DE has a population of 15,230 and is the 2,796th largest city in the United States. The population density is 1,534 per sq mi which is 317% higher than the Delaware average and 1594% higher than the national average. The median age in Glasgow is 36 which is approximately 9% lower than the Delaware average of 40. In Glasgow, 55% of the population over 15 years of age are married, 90% speak English and 3% speak Spanish. 46% of Glasgow residents were born in Delaware, 43% were born out of state, 0% were born outside of the United States and 11% were foreign born.