County ZIP codes · Texas · FIPS 48041
Brazos County, TX ZIP Codes
Brazos County, Texas has 18 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 11 residential and 7 for PO boxes or a single organization. 9 of the residential ones lie mainly in Brazos County and 2 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $39,846 in 77801 to $113,343 in 77808 (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Brazos 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 $52,274 and $74,375.
They carry 5 postal town names: College Station, Bryan, Navasota, Hearne, Millican.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 11 residential ZIP codes in Brazos County
9 ZIP codes lie mainly in Brazos County; 2 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 77845 | College Station | 76,764 | 539 | $89k | $365k | 100% |
| 77840 | College Station | 54,864 | 5,506 | $30k | $245k | 100% |
| 77803 | Bryan | 31,525 | 2,323 | $52k | $153k | 100% |
| 77802 | Bryan | 25,762 | 2,247 | $71k | $255k | 100% |
| 77808 | Bryan | 15,797 | 62 | $113k | $375k | 84% |
| 77801 | Bryan | 15,461 | 5,043 | $40k | $162k | 100% |
| 77807 | Bryan | 13,227 | 135 | $74k | $279k | 85% |
| 77843 | College Station | 8,259 | 22,382 | – | – | 100% |
| 77866 | Millican | no residents | 0 | – | – | 100% |
Partly in Brazos 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?
4 ZIP codes of Brazos County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Brazos | Elsewhere |
|---|---|---|
| 77868 | 28% | Grimes County 70% |
| 77808 | 84% | Robertson County 16% |
| 77807 | 85% | Robertson County 15% |
| 77859 | 17% | Robertson County 83% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Brazos 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 Brazos County starts with 778.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 778 | North Houston, TX (SCF 773) | 18 | 47 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.