Elizabeth, NJ has a population of 128,042 and is the 215th largest city in the United States. The population density is 10,394 per sq mi which is 1039300% higher than the New Jersey average and 11372% higher than the national average. The median age in Elizabeth is 33 which is approximately 16% lower than the New Jersey average of 40. In Elizabeth, 41% of the population over 15 years of age are married, 25% speak English and 61% speak Spanish. 40% of Elizabeth residents were born in New Jersey, 8% were born out of state, 5% were born outside of the United States and 47% were foreign born.