New Milford, NJ has a population of 16,682 and is the 2,564th largest city in the United States. The population density is 7,307 per sq mi which is 730633% higher than the New Jersey average and 7965% higher than the national average. The median age in New Milford is 42 which is approximately 5% higher than the New Jersey average of 40. In New Milford, 62% of the population over 15 years of age are married, 57% speak English and 15% speak Spanish. 40% of New Milford residents were born in New Jersey, 27% were born out of state, 2% were born outside of the United States and 31% were foreign born.