Chappaqua, NY has a population of 1,328 and is the 13,426th largest city in the United States. The population density is 2,905 per sq mi which is 710% higher than the New York average and 3107% higher than the national average. The median age in Chappaqua is 43 which is approximately 14% higher than the New York average of 38. In Chappaqua, 57% of the population over 15 years of age are married, 84% speak English and 4% speak Spanish. 74% of Chappaqua residents were born in New York, 15% were born out of state, 0% were born outside of the United States and 11% were foreign born.