Ithaca, NY has a population of 30,625 and is the 1,388th largest city in the United States. The population density is 5,684 per sq mi which is 1484% higher than the New York average and 6174% higher than the national average. The median age in Ithaca is 22 which is approximately 43% lower than the New York average of 38. In Ithaca, 18% of the population over 15 years of age are married, 81% speak English and 3% speak Spanish. 41% of Ithaca residents were born in New York, 41% were born out of state, 2% were born outside of the United States and 17% were foreign born.