Arden, DE has a population of 485 and is the 19,716th largest city in the United States. The population density is 1,872 per sq mi which is 408% higher than the Delaware average and 1967% higher than the national average. The median age in Arden is 55 which is approximately 38% higher than the Delaware average of 40. In Arden, 53% of the population over 15 years of age are married, 95% speak English and 0% speak Spanish. 25% of Arden residents were born in Delaware, 68% were born out of state, 2% were born outside of the United States and 5% were foreign born.