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Oregon County, Missouri ZIP codes

5 ZIP codes are in Oregon County, plus 7 that cross in from neighboring counties.

ZIP codes
5
Population in these ZIPs
8,434
Avg. median income
$43,900population-weighted
Cities & towns
5
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ZIP codes in Oregon County

ZIP codes in Oregon County
ZIP codeCityPopulationMedian incomeTypical home value
65606Alton2,381$51,909$169,900
65690Couch130—$203,200
65692Koshkonong1,068$40,357$229,900
65778Myrtle430$23,669$176,000
65791Thayer4,425$42,470$141,400

ZIP codes partly in Oregon County

These ZIP codes are mostly in a neighboring county but cover part of Oregon County.

ZIP codes partly in Oregon County
ZIP codeCityCountyPopulationMedian incomeTypical home value
63935DoniphanRipley County7,931$42,985$158,600
63941FremontCarter County221$29,352—
63942GatewoodRipley County490$47,250$132,400
65438Birch TreeShannon County2,363$54,028$178,500
65588WinonaShannon County2,235$44,500$154,800
65775West PlainsHowell County25,773$52,206$225,300
65788Peace ValleyHowell County341$64,375$110,400

Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology

Cities and towns in Oregon County

Nearby counties

Frequently asked questions

How many ZIP codes are in Oregon County, Missouri?

5 ZIP codes are mainly in Oregon County, and 7 more ZIP codes from neighboring areas reach partly into it.

What cities are in Oregon County?

ZIP codes in Oregon County use the city names Alton, Couch, Koshkonong, Myrtle and Thayer.