Historical Markers and War Memorials in Monongahela, Pennsylvania
Washington is the county seat for Washington County
Monongahela is in Washington County
Washington County(377) ► ADJACENT TO WASHINGTON COUNTY Allegheny County(673) ► Beaver County(218) ► Fayette County(278) ► Greene County(92) ► Westmoreland County(165) ► Brooke County, West Virginia(47) ► Hancock County, West Virginia(28) ► Marshall County, West Virginia(48) ► Ohio County, West Virginia(176) ►
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