Oregon County Maps
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Marion County, Oregon
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Marion County, Oregon Map
An detailed map of Marion County. Click on a nearby County to view more information about that County.
Map of Counties in Oregon
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About Marion County, Oregon
Marion County is one of the 36 counties in the U.S. state of Oregon. The population was 345,920 at the 2020 census, making it the 5th most populous county in Oregon. The county seat is Salem, which is also the state capital of Oregon. The county was originally named the Champooick District, after Champoeg, a meeting place on the Willamette River. On September 3, 1849, the territorial legislature renamed it in honor of Francis Marion, a Continental Army general from South Carolina who served in the American Revolutionary War. Marion County is part of the Salem, OR Metropolitan Statistical Area, which is also included in the Portland-Vancouver-Salem, OR-WA Combined Statistical Area. It is located in the Willamette Valley.
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This site has an interactive map of Oregon Counties. Click on the map to find your Oregon county, and view more details. You can also search for your address and use your GPS to find your Oregon County.
Find what County you are in, and see official Oregon County resources and information. Find any county in the United Stated, along with resources and links to official County websites. See a County map and local details. Looking for what county you are currently in? Find out on this map or use your device GPS to see what county you are in.