Putnam Lake, NY has a population of 3,666 and is the 7,832nd largest city in the United States. The population density is 954 per sq mi which is 166% higher than the New York average and 953% higher than the national average. The median age in Putnam Lake is 47 which is approximately 22% higher than the New York average of 38. In Putnam Lake, 60% of the population over 15 years of age are married, 82% speak English and 9% speak Spanish. 73% of Putnam Lake residents were born in New York, 16% were born out of state, 2% were born outside of the United States and 10% were foreign born.