Wilmington Manor, DE has a population of 7,923 and is the 4,725th largest city in the United States. The population density is 5,097 per sq mi which is 1284% higher than the Delaware average and 5526% higher than the national average. The median age in Wilmington Manor is 38 which is approximately 5% lower than the Delaware average of 40. In Wilmington Manor, 61% of the population over 15 years of age are married, 80% speak English and 17% speak Spanish. 53% of Wilmington Manor residents were born in Delaware, 31% were born out of state, 3% were born outside of the United States and 13% were foreign born.