Avon-by-the-Sea, NJ has a population of 1,846 and is the 11,491st largest city in the United States. The population density is 4,338 per sq mi which is 433691% higher than the New Jersey average and 4688% higher than the national average. The median age in Avon-by-the-Sea is 53 which is approximately 33% higher than the New Jersey average of 40. In Avon-by-the-Sea, 59% of the population over 15 years of age are married, 96% speak English and 2% speak Spanish. 72% of Avon-by-the-Sea residents were born in New Jersey, 26% were born out of state, 1% were born outside of the United States and 1% were foreign born.