Avalon is a borough in Allegheny County, Pennsylvania, United States, along the Ohio River 6 miles (10 km) downstream from Pittsburgh.

They petitioned the Court of Quarter Sessions of Pennsylvania for incorporation papers.

The petition was drawn up by Noah Shafer, who eventually became West Bellevue's first solicitor.

The group was notified that it first had to hold an election so officials of the petitioning body could make the request for incorporation.

[4] It was named after the legendary island of Avalon ("land of apples") on account of there being several orchards in the area.

[8] Avalon has four land borders, including Ben Avon Heights to the north, Kilbuck Township to the north, northeast and northwestern corner, Bellevue to the east, and Ben Avon to the west.

Across the Ohio River to the south, Avalon runs adjacent with the eastern end of Neville Island (Neville Township) as well as the Davis Island Lock and Dam Site in which its location is designated as in Avalon.