Hemlock, NY has a population of 422 and is the 20,577th largest city in the United States. The population density is 227 per sq mi which is 37% lower than the New York average and 150% higher than the national average. The median age in Hemlock is 37 which is approximately 4% lower than the New York average of 38. In Hemlock, 71% of the population over 15 years of age are married, 96% speak English and 0% speak Spanish. 100% of Hemlock residents were born in New York, 0% were born out of state, 0% were born outside of the United States and 0% were foreign born.