Glidden, IA has a population of 1,422 and is the 13,008th largest city in the United States. The population density is 1,285 per sq mi which is 2253% higher than the Iowa average and 1319% higher than the national average. The median age in Glidden is 34 which is approximately 11% lower than the Iowa average of 38. In Glidden, 64% of the population over 15 years of age are married, 98% speak English and 1% speak Spanish. 84% of Glidden residents were born in Iowa, 14% were born out of state, 0% were born outside of the United States and 2% were foreign born.