Plain

County ZIP codes · Missouri · FIPS 29149

Oregon County, MO ZIP Codes

Oregon County, Missouri has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in Oregon County and 7 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $42,470 in 65791 (Thayer) to $52,206 in 65775 (West Plains) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Oregon County?

63935 · Doniphan: $43k63941 · Fremont: $29k63942 · Gatewood: $47k65438 · Birch Tree: $54k65588 · Winona: $45k65606 · Alton: $52k65690 · Couch: –65692 · Koshkonong: $40k65775 · West Plains: $52k65778 · Myrtle: $24k65788 · Peace Valley: $64k65791 · Thayer: $43k65775639356558865438656066569265791639416394265690657786578863935 · Doniphan: $43k63941 · Fremont: $29k63942 · Gatewood: $47k65438 · Birch Tree: $54k65588 · Winona: $45k65606 · Alton: $52k65690 · Couch: –65692 · Koshkonong: $40k65775 · West Plains: $52k65778 · Myrtle: $24k65788 · Peace Valley: $64k65791 · Thayer: $43k657756393565588654386560665692657916394163942656906577863935 · Doniphan: $43k63941 · Fremont: $29k63942 · Gatewood: $47k65438 · Birch Tree: $54k65588 · Winona: $45k65606 · Alton: $52k65690 · Couch: –65692 · Koshkonong: $40k65775 · West Plains: $52k65778 · Myrtle: $24k65788 · Peace Valley: $64k65791 · Thayer: $43k6577563935655886543865606656926394163942
The residential ZIP codes of Oregon County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $42,470 and $51,909.

They carry 12 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 12 residential ZIP codes in Oregon County

5 ZIP codes lie mainly in Oregon County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Oregon County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
65791 Thayer 4,425 29 $43k $101k 100%
65606 Alton 2,381 11 $52k $119k 100%
65692 Koshkonong 1,068 10 $40k $144k 58%
65778 Myrtle 430 12 $24k $157k 100%
65690 Couch 130 4 – $203k 100%

Partly in Oregon County

Residential ZIP codes mainly in another county that reach at least 1% into Oregon County, by their share here
In this county
63941 Fremont 221 2 $29k – 33%
65438 Birch Tree 2,363 8 $54k $117k 33%
65588 Winona 2,235 10 $45k $156k 32%
63942 Gatewood 490 6 $47k $132k 28%
65788 Peace Valley 341 13 $64k $110k 9%
63935 Doniphan 7,931 17 $43k $125k 7%
65775 West Plains 25,773 58 $52k $185k 5%

Download the 12 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

8 ZIP codes of Oregon County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Oregon County and in the neighboring counties
ZIPIn OregonElsewhere
657755%Howell County 91%; Douglas County 4%
639357%Ripley County 92%
6543833%Shannon County 67%
6558832%Shannon County 68%
6569258%Howell County 42%
6394228%Ripley County 72%
657889%Howell County 91%
6394133%Carter County 66%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Oregon County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Oregon County's ZIP codes use 5 prefixes: 639, 654, 655, 656 and 657.

Three-digit prefixes of Oregon County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Oregon County's
PrefixSectional centerHereAll codes
639 St Louis, MO (SCF 630) 3 32
654 Springfield, MO (SCF 656) 1 29
655 Springfield, MO (SCF 656) 1 33
656 Springfield, MO (SCF 656) 3 75
657 Springfield, MO (SCF 656) 4 75

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.