Juliustown, NJ has a population of 300 and is the 22,503rd largest city in the United States. The population density is 253 per sq mi which is 25180% higher than the New Jersey average and 179% higher than the national average. The median age in Juliustown is 51 which is approximately 28% higher than the New Jersey average of 40. In Juliustown, 70% of the population over 15 years of age are married, 96% speak English and 3% speak Spanish. 74% of Juliustown residents were born in New Jersey, 25% were born out of state, 0% were born outside of the United States and 1% were foreign born.