Glendale, CO has a population of 4,905 and is the 6,555th largest city in the United States. The population density is 8,511 per sq mi which is 16993% higher than the Colorado average and 9294% higher than the national average. The median age in Glendale is 29 which is approximately 21% lower than the Colorado average of 36. In Glendale, 22% of the population over 15 years of age are married, 67% speak English and 21% speak Spanish. 22% of Glendale residents were born in Colorado, 50% were born out of state, 2% were born outside of the United States and 25% were foreign born.