Wallingford Center, CT has a population of 17,634 and is the 2,453rd largest city in the United States. The population density is 2,430 per sq mi which is 275% higher than the Connecticut average and 2582% higher than the national average. The median age in Wallingford Center is 43 which is approximately 7% higher than the Connecticut average of 41. In Wallingford Center, 53% of the population over 15 years of age are married, 82% speak English and 10% speak Spanish. 69% of Wallingford Center residents were born in Connecticut, 20% were born out of state, 1% were born outside of the United States and 10% were foreign born.