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

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zipcodes.pro — STATE/MO/COUNTY/MADISON

Madison County, MO ZIP codes

Madison County, MO has 2 ZIP codes, in 2 towns: 63645 and 63655. 1 more crosses into it from a neighbouring county: 63620.

The county seat is Fredericktown.

ZIP codes
2
Partly in it
1 more
Towns
2
County seat
Fredericktown
County FIPS
29123
Population
12,729
Median household income
$54,434
Land area
494 sq mi
Area code
235

Madison County ZIP codes by town

Fredericktown (county seat)
63645

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 Madison County

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

Map of Madison County ZIP codes

6364563655

The ZIP codes of Madison 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.

Madison County in numbers

About 12,729 people live in Madison County, in 4,683 households, the 74th most populous of Missouri's 115 counties. The median household income is $54,434 a year, 23% below the Missouri median of $70,702 (US: $80,734). The median owner-occupied home is valued at $159,000 (31% below the Missouri median), and median gross rent is $808 a month. The median age is 41.1; 16.3% of adults 25 and over hold a bachelor's degree or higher (32.4% across Missouri); the average commute takes 24 minutes.

Population12,729Madison12,729
Households4,683Madison4,683
Median age41.1Madison41.1Missouri39.0US 38.9
Median household income$54,434Madison$54,434Missouri$70,702US $80,734
Median home value$159,000Madison$159,000Missouri$230,300US $332,700
Median gross rent$808Madison$808Missouri$1,033US $1,413
Bachelor's degree or higher16.3%Madison16.3%Missouri32.4%US 35.7%
Mean commute23.9 minMadison23.9 minMissouri23.5 minUS 26.4 min
Population density26 / sq miMadison26 / 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 Madison County

Largest towns in Madison County
TownZIP codesPopulation
Fredericktown 1 4,507
Marquand 1 187

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 Madison County.

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

Every ZIP code in Madison County, with figures

ZIP codes in Madison County
ZIP City Type Population Median income Median home
63645 Fredericktown , MO Standard 11,554 $54,747 $157,500
63655 Marquand , MO Standard 1,639 $61,469 $175,600

Cite this page

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

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