Guttenberg, NJ has a population of 11,628 and is the 3,503rd largest city in the United States. The population density is 60,244 per sq mi which is 6024310% higher than the New Jersey average and 66395% higher than the national average. The median age in Guttenberg is 36 which is approximately 8% lower than the New Jersey average of 40. In Guttenberg, 41% of the population over 15 years of age are married, 19% speak English and 67% speak Spanish. 29% of Guttenberg residents were born in New Jersey, 14% were born out of state, 1% were born outside of the United States and 56% were foreign born.