Fair Haven, NJ has a population of 6,033 and is the 5,742nd largest city in the United States. The population density is 3,786 per sq mi which is 378506% higher than the New Jersey average and 4079% higher than the national average. The median age in Fair Haven is 42 which is approximately 6% higher than the New Jersey average of 40. In Fair Haven, 74% of the population over 15 years of age are married, 95% speak English and 2% speak Spanish. 56% of Fair Haven residents were born in New Jersey, 40% were born out of state, 1% were born outside of the United States and 3% were foreign born.