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Marion County Boundary Changes
Over Time
Marion County used to be called Champoeg
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- 1843 Champoeg County ( from the Coastal Range to the Rocky
Mountains): [ View Map
]
- 1845 Champoeg County covers much of Oregon: [ View
Map ]
- 1847 Champoeg is renamed Marion County and shrinks in
size: [ View Map ]
- 1851 Benton, Umpqua, and Polk Counties are created: [
View Map ]
- 1853 Washington Territory was separated from Oregon.
The county's easterly borders extended to the Rocky Mountains.
[ View Map ]
- 1856 Marion County obtains its lasting shape: [ View
Map ]
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