County ZIP codes · Texas · FIPS 48395
Robertson County, TX ZIP Codes
Robertson County, Texas has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 1 for PO boxes or a single organization. 6 of the residential ones lie mainly in Robertson County and 4 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $52,639 in 77859 (Hearne) to $113,343 in 77808 (Bryan) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Robertson 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 $72,262 and $74,375.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Robertson County
6 ZIP codes lie mainly in Robertson County; 4 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 77859 | Hearne | 7,532 | 48 | $53k | $160k | 83% |
| 77856 | Franklin | 5,515 | 15 | $95k | $318k | 100% |
| 76629 | Bremond | 2,053 | 14 | $72k | $211k | 82% |
| 77837 | Calvert | 1,030 | 9 | $58k | $120k | 100% |
| 77867 | Mumford | 206 | 9 | $36k | <$10k | 100% |
| 77882 | Wheelock | no residents | 0 | – | – | 100% |
Partly in Robertson 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?
6 ZIP codes of Robertson County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Robertson | Elsewhere |
|---|---|---|
| 77808 | 16% | Brazos County 84% |
| 77807 | 15% | Brazos County 85% |
| 77859 | 83% | Brazos County 17% |
| 76629 | 82% | Falls County 18% |
| 76687 | 16% | Limestone County 83% |
| 76653 | 9% | Limestone County 58%; Falls County 33% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
| ZIP | Postal name |
|---|---|
| 77870 | New Baden |
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Robertson County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Robertson County's ZIP codes use 2 prefixes: 766 and 778.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 766 | Fort Worth, TX (SCF 760) | 3 | 58 |
| 778 | North Houston, TX (SCF 773) | 8 | 47 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.