Lawnside, NJ has a population of 2,923 and is the 8,936th largest city in the United States. The population density is 2,043 per sq mi which is 204241% higher than the New Jersey average and 2155% higher than the national average. The median age in Lawnside is 47 which is approximately 20% higher than the New Jersey average of 40. In Lawnside, 43% of the population over 15 years of age are married, 91% speak English and 5% speak Spanish. 56% of Lawnside residents were born in New Jersey, 39% were born out of state, 0% were born outside of the United States and 5% were foreign born.