Lopatcong Overlook, NJ has a population of 645 and is the 17,963rd largest city in the United States. The population density is 1,774 per sq mi which is 177329% higher than the New Jersey average and 1858% higher than the national average. The median age in Lopatcong Overlook is 30 which is approximately 25% lower than the New Jersey average of 40. In Lopatcong Overlook, 61% of the population over 15 years of age are married, 97% speak English and 0% speak Spanish. 67% of Lopatcong Overlook residents were born in New Jersey, 28% were born out of state, 2% were born outside of the United States and 3% were foreign born.