County ZIP codes · Missouri · FIPS 29143
New Madrid County, MO ZIP Codes
New Madrid County, Missouri has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 13 of the residential ones lie mainly in New Madrid County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $43,940 in 63862 (Lilbourn) to $62,698 in 63801 (Sikeston) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of New Madrid County?
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 $46,066 and $54,362.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 17 residential ZIP codes in New Madrid County
13 ZIP codes lie mainly in New Madrid County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 63873 | Portageville | 4,015 | 21 | $54k | $128k | 69% |
| 63869 | New Madrid | 3,218 | 31 | $58k | $132k | 100% |
| 63862 | Lilbourn | 1,237 | 19 | $44k | $82k | 100% |
| 63870 | Parma | 1,066 | 13 | $58k | $62k | 64% |
| 63848 | Gideon | 887 | 11 | $43k | $64k | 84% |
| 63867 | Matthews | 764 | 9 | $47k | $111k | 100% |
| 63868 | Morehouse | 653 | 661 | $32k | $57k | 100% |
| 63866 | Marston | 409 | 106 | $34k | $64k | 100% |
| 63874 | Risco | 288 | 298 | $48k | $62k | 100% |
| 63828 | Canalou | 177 | 181 | $47k | $32k | 100% |
| 63860 | Kewanee | 172 | 41 | $41k | $56k | 100% |
| 63833 | Catron | 137 | 2 | $61k | $193k | 53% |
| 63878 | Tallapoosa | 92 | 172 | – | $61k | 100% |
Partly in New Madrid County
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 New Madrid County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In New Madrid | Elsewhere |
|---|---|---|
| 63801 | 30% | Scott County 58%; Stoddard County 11%; Mississippi County 1% |
| 63863 | 28% | Dunklin County 72% |
| 63845 | 14% | Mississippi County 86% |
| 63873 | 69% | Pemiscot County 31% |
| 63837 | 28% | Dunklin County 72% |
| 63870 | 64% | Stoddard County 36% |
| 63848 | 84% | Pemiscot County 16% |
| 63833 | 53% | Stoddard County 47% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do New Madrid 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 New Madrid County starts with 638.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 638 | St Louis, MO (SCF 630) | 17 | 47 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.