Gilbertsville, NY has a population of 332 and is the 21,937th largest city in the United States. The population density is 331 per sq mi which is 8% lower than the New York average and 265% higher than the national average. The median age in Gilbertsville is 54 which is approximately 42% higher than the New York average of 38. In Gilbertsville, 62% of the population over 15 years of age are married, 98% speak English and 0% speak Spanish. 74% of Gilbertsville residents were born in New York, 17% were born out of state, 1% were born outside of the United States and 8% were foreign born.