Rehoboth Beach, DE has a population of 1,119 and is the 14,465th largest city in the United States. The population density is 952 per sq mi which is 158% higher than the Delaware average and 951% higher than the national average. The median age in Rehoboth Beach is 65 which is approximately 65% higher than the Delaware average of 40. In Rehoboth Beach, 62% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 21% of Rehoboth Beach residents were born in Delaware, 73% were born out of state, 1% were born outside of the United States and 5% were foreign born.