Delhi, NY has a population of 3,099 and is the 8,640th largest city in the United States. The population density is 986 per sq mi which is 175% higher than the New York average and 989% higher than the national average. The median age in Delhi is 21 which is approximately 46% lower than the New York average of 38. In Delhi, 22% of the population over 15 years of age are married, 89% speak English and 6% speak Spanish. 81% of Delhi residents were born in New York, 13% were born out of state, 2% were born outside of the United States and 5% were foreign born.