Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/MO/COUNTY/MARION

Marion County, MO ZIP codes

Marion County, MO has 6 ZIP codes, in 6 towns: 63401, 63461, 63456, 63454, 63463 and 63471. 1 more crosses into it from a neighbouring county: 63440.

The county seat is Palmyra.

ZIP codes
6
Partly in it
1 more
Towns
6
County seat
Palmyra
County FIPS
29127
Population
28,457
Median household income
$62,903
Land area
437 sq mi
Metro area
Hannibal

Marion County ZIP codes by town

Palmyra (county seat)
63461

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

ZIP codes partly in Marion County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Marion County.

Map of Marion County ZIP codes

634016345463456634616346363471

The ZIP codes of Marion County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Marion County in numbers

About 28,457 people live in Marion County, in 11,323 households, the 39th most populous of Missouri's 115 counties. The median household income is $62,903 a year, 11% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $162,000 (30% below the Missouri median), and median gross rent is $808 a month. The median age is 39.6; 24.6% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 18 minutes.

Population28,457Marion28,457
Households11,323Marion11,323
Median age39.6Marion39.6Missouri39.0US 38.9
Median household income$62,903Marion$62,903Missouri$70,702US $80,734
Median home value$162,000Marion$162,000Missouri$230,300US $332,700
Median gross rent$808Marion$808Missouri$1,033US $1,413
Bachelor's degree or higher24.6%Marion24.6%Missouri32.4%US 35.7%
Mean commute17.6 minMarion17.6 minMissouri23.5 minUS 26.4 min
Population density65 / sq miMarion65 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Marion County

Largest towns in Marion County
TownZIP codesPopulation
Hannibal 1 16,771
Palmyra 1 3,623
Monroe City 1 3,028
Maywood 1 1,104
Taylor 1 770
Philadelphia 1 219

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Marion County.

Not sure you are in Marion County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Marion County, with figures

ZIP codes in Marion County
ZIP City Type Population Median income Median home
63401 Hannibal , MO Standard 21,489 $60,036 $152,100
63454 Maywood , MO Standard 1,104 $88,192 $167,200
63456 Monroe City , MO Standard 4,749 $64,160 $161,200
63461 Palmyra , MO Standard 5,446 $69,707 $212,000
63463 Philadelphia , MO Standard 711 $69,688 $146,100
63471 Taylor , MO Standard 770 $103,182 $271,200

Cite this page

zipcodes.pro. “Marion County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mo/county/marion

Underlying data is public domain or openly licensed — sources, vintages and licences.