Linden, NJ has a population of 41,595 and is the 983rd largest city in the United States. The population density is 3,892 per sq mi which is 389089% higher than the New Jersey average and 4196% higher than the national average. The median age in Linden is 37 which is approximately 6% lower than the New Jersey average of 40. In Linden, 49% of the population over 15 years of age are married, 52% speak English and 26% speak Spanish. 50% of Linden residents were born in New Jersey, 14% were born out of state, 3% were born outside of the United States and 33% were foreign born.