Smyrna, DE has a population of 11,081 and is the 3,638th largest city in the United States. The population density is 1,850 per sq mi which is 402% higher than the Delaware average and 1942% higher than the national average. The median age in Smyrna is 36 which is approximately 9% lower than the Delaware average of 40. In Smyrna, 54% of the population over 15 years of age are married, 91% speak English and 4% speak Spanish. 47% of Smyrna residents were born in Delaware, 46% were born out of state, 1% were born outside of the United States and 6% were foreign born.