Madison Park, NJ has a population of 6,800 and is the 5,279th largest city in the United States. The population density is 4,073 per sq mi which is 407244% higher than the New Jersey average and 4396% higher than the national average. The median age in Madison Park is 40 which is approximately 2% higher than the New Jersey average of 40. In Madison Park, 52% of the population over 15 years of age are married, 47% speak English and 10% speak Spanish. 36% of Madison Park residents were born in New Jersey, 19% were born out of state, 3% were born outside of the United States and 42% were foreign born.