Chatham, NY has a population of 1,470 and is the 12,811th largest city in the United States. The population density is 1,188 per sq mi which is 231% higher than the New York average and 1212% higher than the national average. The median age in Chatham is 46 which is approximately 19% higher than the New York average of 38. In Chatham, 45% of the population over 15 years of age are married, 96% speak English and 0% speak Spanish. 70% of Chatham residents were born in New York, 25% were born out of state, 1% were born outside of the United States and 4% were foreign born.