Long Hill, CT has a population of 4,462 and is the 6,959th largest city in the United States. The population density is 2,901 per sq mi which is 348% higher than the Connecticut average and 3102% higher than the national average. The median age in Long Hill is 35 which is approximately 14% lower than the Connecticut average of 41. In Long Hill, 44% of the population over 15 years of age are married, 82% speak English and 6% speak Spanish. 41% of Long Hill residents were born in Connecticut, 43% were born out of state, 3% were born outside of the United States and 13% were foreign born.