Niskayuna, NY has a population of 4,548 and is the 6,881st largest city in the United States. The population density is 4,515 per sq mi which is 1159% higher than the New York average and 4883% higher than the national average. The median age in Niskayuna is 43 which is approximately 13% higher than the New York average of 38. In Niskayuna, 67% of the population over 15 years of age are married, 86% speak English and 4% speak Spanish. 65% of Niskayuna residents were born in New York, 20% were born out of state, 2% were born outside of the United States and 13% were foreign born.