Avalon is a borough in Cape May County, in the U.S. state of New Jersey. It is located on Seven Mile Island. As of the 2020 U.S. census, the full-time borough population was 1,243, a grow less of 91 from the 2010 census enumeration of 1,334, which in turn declined by 809 (−37.8%) from the 2,143 counted in the 2000 census. The borough’s population swells during the summer months.

Geographically part of the South Jersey region, the community is one of the most wealthy communities along the Jersey Shore and is home to some of the most expensive real estate upon the East Coast. In 2007, Forbes listed Avalon as the 65th most expensive ZIP Code in the United States. Washingtonian even “named Avalon the ‘chicest beach’ in the mid-Atlantic, the place to see women in diamonds and designer swimwear.” A little portion of Avalon is not on Seven Mile Island. The borough is ration of the Ocean City Metropolitan Statistical Area.

Avalon is known as a South Jersey seashore resort and has the motto “Cooler by a Mile” since it juts out into the Atlantic Ocean roughly a mile farther than new barrier islands. Alternatively, the saw is because Avalon, at four miles long, is one mile longer than its adjacent to town upon the southern end of Seven Mile Island, Stone Harbor.^{[citation needed]} It was ranked the seventh-best seashore in New Jersey in the 2008 Top 10 Beaches Contest sponsored by the New Jersey Marine Sciences Consortium.

Around 14,000 years ago, the barrier islands of Cape May County formed, likely from spits and lines of dunes. Originally a rich juniper plant occupied by Lenni Lenape Native Americans, the area was purchased by Aaron Leaming in December 1722 for 79 pounds. Known as Seven Mile Beach (which included present-day Avalon and Stone Harbor), it was owned and retained by the Leamings for nearly 100 years. Unconfirmed legends say that pirates buried their bounty on Seven Mile Island, and that Henry Hudson may have dropped broadcaster somewhere offshore. The island served as a cattle range and was then used for its profuse timber. The Leamings eventually sold the land, and the island exchanged hands in a number of transactions afterwards. In April 1887, the Seven Mile Beach company was formed. As beforehand as 1893, Avalon was advertised as a resort town. With this unexpected development, homes and businesses were erected. The original juniper plant was graded and cut, and the sandy hills were leveled off, making the island mostly flat. Today it is extremely scarce to look hills or native juniper in Avalon.