Monongahela

Monongahela or Mon Valley may refer to:

Places

 * Monongahela, Pennsylvania, a city in Washington County
 * Monongahela Cemetery, a historic cemetery in Monongahela City, Pennsylvania
 * Monongahela City Bridge, spans the Monongahela River
 * Monongahela National Forest, a national forest in eastern West Virginia
 * Monongahela River, a tributary of the Ohio River
 * Battle of the Monongahela (9 July 1755), at the beginning of the French and Indian War
 * Lake Monongahela, former Proglacial lake in Pennsylvania, West Virginia, and Ohio
 * Monongahela Formation, a geologic group

Railways

 * Monongahela Railway, a coal-hauling short line railroad in Pennsylvania and West Virginia in the United States
 * Monongahela Connecting Railroad, a small industrial railroad in Pittsburgh, Pennsylvania
 * Monongahela Freight Incline, a funicular railway that scaled Mount Washington
 * Monongahela Incline, a funicular located near the Smithfield Street Bridge in Pittsburgh, Pennsylvania

Other

 * Monongahela (album), a 1988 album by The Oak Ridge Boys
 * Monongahela (fish), a genus of prehistoric fish
 * Monongahela virus, an Orthohantavirus
 * Monongahela culture, a Native American group
 * USS Monongahela, one of various ships of the United States Navy
 * the Mon Valley, a variant name of the PATrain commuter rail service