Bellefonte, DE has a population of 1,253 and is the 13,766th largest city in the United States. The population density is 7,071 per sq mi which is 1820% higher than the Delaware average and 7704% higher than the national average. The median age in Bellefonte is 41 which is approximately 4% higher than the Delaware average of 40. In Bellefonte, 56% of the population over 15 years of age are married, 97% speak English and 2% speak Spanish. 53% of Bellefonte residents were born in Delaware, 44% were born out of state, 2% were born outside of the United States and 2% were foreign born.