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County ZIP codes · Missouri · FIPS 29127

Marion County, MO ZIP Codes

Marion County, Missouri has 10 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Marion County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $60,036 in 63401 (Hannibal) to $88,192 in 63454 (Maywood) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Marion County?

63401 · Hannibal: $60k63438 · Durham: $42k63439 · Emden: $34k63440 · Ewing: $60k63443 · Hunnewell: $42k63454 · Maywood: $88k63456 · Monroe City: $64k63461 · Palmyra: $70k63463 · Philadelphia: $70k63471 · Taylor: $103k63456634616340163440634716344363454634636343963401 · Hannibal: $60k63438 · Durham: $42k63439 · Emden: $34k63440 · Ewing: $60k63443 · Hunnewell: $42k63454 · Maywood: $88k63456 · Monroe City: $64k63461 · Palmyra: $70k63463 · Philadelphia: $70k63471 · Taylor: $103k63456634616340163440634716344363454634636343963401 · Hannibal: $60k63438 · Durham: $42k63439 · Emden: $34k63440 · Ewing: $60k63443 · Hunnewell: $42k63454 · Maywood: $88k63456 · Monroe City: $64k63461 · Palmyra: $70k63463 · Philadelphia: $70k63471 · Taylor: $103k634566346163401634406347163443634546346363439
The residential ZIP codes of Marion 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 $60,036 and $69,707.

They carry 10 postal town names.

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

All 10 residential ZIP codes in Marion County

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

Residential ZIP codes mainly in Marion County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
63401 Hannibal 21,489 194 $60k $152k 50%
63461 Palmyra 5,446 35 $70k $212k 100%
63456 Monroe City 4,749 26 $64k $161k 39%
63454 Maywood 1,104 26 $88k $167k 72%
63471 Taylor 770 17 $103k $271k 79%
63463 Philadelphia 711 15 $70k $146k 100%

Partly in Marion County

Residential ZIP codes mainly in another county that reach at least 1% into Marion County, by their share here
In this county
63438 Durham 232 18 $42k $188k 32%
63439 Emden 183 8 $34k $87k 28%
63440 Ewing 1,136 13 $60k $148k 26%
63443 Hunnewell 393 8 $42k $96k 18%

Download the 10 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 Marion County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Marion County and in the neighboring counties
ZIPIn MarionElsewhere
6340150%Ralls County 50%
6345639%Ralls County 34%; Monroe County 27%
6344026%Lewis County 72%; Shelby County 2%
6345472%Lewis County 28%
6347179%Lewis County 21%
6344318%Monroe County 49%; Shelby County 33%
6343832%Lewis County 68%
6343928%Shelby County 72%

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

Which first three digits do Marion 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 Marion County starts with 634.

Three-digit prefixes of Marion 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 Marion County's
PrefixSectional centerHereAll codes
634 St Louis, MO (SCF 630) 10 42

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