County ZIP codes · Texas · FIPS 48123
DeWitt County, TX ZIP Codes
DeWitt County, Texas has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 9 residential and 2 for PO boxes or a single organization. 6 of the residential ones lie mainly in DeWitt County and 3 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $54,298 in 77995 (Yoakum) to $92,656 in 77984 (Shiner) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of DeWitt 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 $59,521 and $67,578.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 9 residential ZIP codes in DeWitt County
6 ZIP codes lie mainly in DeWitt County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 77954 | Cuero | 11,424 | 30 | $66k | $187k | 95% |
| 77995 | Yoakum | 10,365 | 28 | $54k | $189k | 48% |
| 78164 | Yorktown | 2,927 | 12 | $68k | $171k | 87% |
| 78141 | Nordheim | 868 | 11 | $44k | $76k | 78% |
| 77974 | Meyersville | 695 | 24 | $54k | $164k | 64% |
| 77994 | Westhoff | 424 | 7 | $88k | – | 93% |
Partly in DeWitt 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?
9 ZIP codes of DeWitt County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In DeWitt | Elsewhere |
|---|---|---|
| 78629 | 2% | Gonzales County 98% |
| 77954 | 95% | Gonzales County 5% |
| 77995 | 48% | Lavaca County 43%; Victoria County 9% |
| 77984 | 1% | Lavaca County 65%; Gonzales County 34% |
| 78164 | 87% | Goliad County 13% |
| 78151 | 5% | Karnes County 95% |
| 78141 | 78% | Karnes County 22% |
| 77974 | 64% | Victoria County 36% |
| 77994 | 93% | Gonzales County 7% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 77967 | Hochheim |
| 77989 | Thomaston |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do DeWitt County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. DeWitt County's ZIP codes use 3 prefixes: 779, 781 and 786.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 779 | Corpus Christi, TX (SCF 783) | 7 | 38 |
| 781 | San Antonio, TX (SCF 780) | 3 | 46 |
| 786 | Austin, TX (SCF 786) | 1 | 75 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.