Medford, NY has a population of 23,829 and is the 1,837th largest city in the United States. The population density is 2,207 per sq mi which is 515% higher than the New York average and 2336% higher than the national average. The median age in Medford is 40 which is approximately 5% higher than the New York average of 38. In Medford, 54% of the population over 15 years of age are married, 80% speak English and 13% speak Spanish. 83% of Medford residents were born in New York, 4% were born out of state, 2% were born outside of the United States and 11% were foreign born.