Greenville, DE has a population of 2,265 and is the 10,351st largest city in the United States. The population density is 825 per sq mi which is 124% higher than the Delaware average and 811% higher than the national average. The median age in Greenville is 48 which is approximately 20% higher than the Delaware average of 40. In Greenville, 66% of the population over 15 years of age are married, 78% speak English and 0% speak Spanish. 30% of Greenville residents were born in Delaware, 48% were born out of state, 1% were born outside of the United States and 21% were foreign born.