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Allegheny

American  
[al-i-gey-nee] / ˌæl ɪˈgeɪ ni /

noun

  1. a river flowing NW from Pennsylvania into SW New York and then S through W Pennsylvania, joining the Monongahela at Pittsburgh to form the Ohio River. 325 miles (525 km) long.


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In 2012, a team of researchers investigating reports of synchronous fireflies stayed at their bed-and-breakfast in Kellettville, Pa., a small community surrounded by Allegheny National Forest.

From The Wall Street Journal Jun. 3, 2026

Kendra Sullivan was at her family’s cabin in the Allegheny Highlands region in late October “just planning on having a low-key country weekend.”

From Salon Mar. 28, 2026

Allegheny County put $42.5 million into the build.

From Slate Nov. 24, 2025

Where I’m from, everybody who is Black in our city has a reference point to the Allegheny County Jail, which is in the middle of Pittsburgh.

From Los Angeles Times Apr. 17, 2025

The two men struck out for the Allegheny River, planning to cross it on the ice.

From "George Washington, Spymaster" by Thomas B. Allen

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