Fonda, NY has a population of 649 and is the 17,926th largest city in the United States. The population density is 1,203 per sq mi which is 235% higher than the New York average and 1228% higher than the national average. The median age in Fonda is 41 which is approximately 7% higher than the New York average of 38. In Fonda, 50% of the population over 15 years of age are married, 98% speak English and 2% speak Spanish. 87% of Fonda residents were born in New York, 12% were born out of state, 0% were born outside of the United States and 1% were foreign born.