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County ZIP codes · Missouri · FIPS 29111

Lewis County, MO ZIP Codes

Lewis County, Missouri has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Lewis County and 4 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $43,478 in 63447 (La Belle) to $88,192 in 63454 (Maywood) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Lewis County?

63435 · Canton: $62k63438 · Durham: $42k63440 · Ewing: $60k63446 · Knox City: $61k63447 · La Belle: $44k63448 · La Grange: $61k63452 · Lewistown: $62k63454 · Maywood: $88k63457 · Monticello: $58k63471 · Taylor: $103k63473 · Williamstown: $57k63474 · Wyaconda: $51k634356345263446634476344063474634716347363454634486345763435 · Canton: $62k63438 · Durham: $42k63440 · Ewing: $60k63446 · Knox City: $61k63447 · La Belle: $44k63448 · La Grange: $61k63452 · Lewistown: $62k63454 · Maywood: $88k63457 · Monticello: $58k63471 · Taylor: $103k63473 · Williamstown: $57k63474 · Wyaconda: $51k634356345263446634476344063474634716347363454634486345763435 · Canton: $62k63438 · Durham: $42k63440 · Ewing: $60k63446 · Knox City: $61k63447 · La Belle: $44k63448 · La Grange: $61k63452 · Lewistown: $62k63454 · Maywood: $88k63457 · Monticello: $58k63471 · Taylor: $103k63473 · Williamstown: $57k63474 · Wyaconda: $51k6343563452634466344763440634746347163473634546344863457
The residential ZIP codes of Lewis 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 $43,478 and $62,102.

They carry 12 postal town names.

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

All 12 residential ZIP codes in Lewis County

8 ZIP codes lie mainly in Lewis County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Lewis County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
63435 Canton 4,318 30 $62k $152k 68%
63448 La Grange 1,760 36 $61k $118k 100%
63440 Ewing 1,136 13 $60k $148k 72%
63447 La Belle 1,060 12 $44k $94k 96%
63452 Lewistown 1,026 10 $62k $87k 100%
63457 Monticello 389 11 $58k $181k 100%
63473 Williamstown 375 6 $57k $166k 52%
63438 Durham 232 18 $42k $188k 68%

Partly in Lewis County

Residential ZIP codes mainly in another county that reach at least 1% into Lewis County, by their share here
In this county
63454 Maywood 1,104 26 $88k $167k 28%
63471 Taylor 770 17 $103k $271k 21%
63446 Knox City 493 5 $61k – 8%
63474 Wyaconda 444 6 $51k $68k 2%

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?

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

Share of each ZIP code's land in Lewis County and in the neighboring counties
ZIPIn LewisElsewhere
6343568%Clark County 32%
6344072%Marion County 26%; Shelby County 2%
6345428%Marion County 72%
6344796%Knox County 4%
6347121%Marion County 79%
634468%Knox County 92%
634742%Clark County 94%; Scotland County 4%
6347352%Clark County 48%
6343868%Marion County 32%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Lewis County starts with 634.

Three-digit prefixes of Lewis 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 Lewis County's
PrefixSectional centerHereAll codes
634 St Louis, MO (SCF 630) 12 42

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