First three digits · Texas
ZIP Codes Starting with
47 ZIP codes start with 778, sorted at the North Houston, TX (SCF 773) sectional center (USPS labeling list L005, effective October 1, 2026) in Texas: 36 residential ZIP codes across 10 counties and 11 PO Box or single-organization codes (Census 2020 ZCTAs and GeoNames postal codes, October 2026).
What do the digits 778 mean?
The first digit, 7, is one of ten national areas (Arkansas, Louisiana, Oklahoma and Texas). The first three, 778, route mail to a sectional center: USPS labeling list L005 (effective October 1, 2026) sends letters for 778 to the North Houston, TX (SCF 773) facility. The last two digits pick the delivery area. By residents, the largest town names among the 778 ZIP codes are College Station, Bryan, Brenham, Navasota, Caldwell and Madisonville.
The same facility sorts 3 prefixes, 191 ZIP codes in all: 773, 775, 778.
Where are the 778 ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All ZIP codes starting with 778
| County | ||||||
|---|---|---|---|---|---|---|
| 77801 | Bryan | Brazos County | 15,461 | 5,043 | $40k | $162k |
| 77802 | Bryan | Brazos County | 25,762 | 2,247 | $71k | $255k |
| 77803 | Bryan | Brazos County | 31,525 | 2,323 | $52k | $153k |
| 77805 | Bryan | Brazos County | PO Box or unique | – | – | – |
| 77806 | Bryan | Brazos County | PO Box or unique | – | – | – |
| 77807 | Bryan | Brazos County | 13,227 | 135 | $74k | $279k |
| 77808 | Bryan | Brazos County | 15,797 | 62 | $113k | $375k |
| 77830 | Anderson | Grimes County | 3,238 | 17 | $103k | $350k |
| 77831 | Bedias | Grimes County | 3,676 | 16 | $58k | $195k |
| 77833 | Brenham | Washington County | 29,498 | 94 | $73k | $281k |
| 77834 | Brenham | Washington County | PO Box or unique | – | – | – |
| 77835 | Burton | Washington County | 2,569 | 23 | $110k | $395k |
| 77836 | Caldwell | Burleson County | 12,670 | 29 | $76k | $215k |
| 77837 | Calvert | Robertson County | 1,030 | 9 | $58k | $120k |
| 77838 | Chriesman | Burleson County | PO Box or unique | – | – | – |
| 77840 | College Station | Brazos County | 54,864 | 5,506 | $30k | $245k |
| 77841 | College Station | Brazos County | PO Box or unique | – | – | – |
| 77842 | College Station | Brazos County | PO Box or unique | – | – | – |
| 77843 | College Station | Brazos County | 8,259 | 22,382 | – | – |
| 77844 | College Station | Brazos County | PO Box or unique | – | – | – |
| 77845 | College Station | Brazos County | 76,764 | 539 | $89k | $365k |
| 77850 | Concord | Leon County | PO Box or unique | – | – | – |
| 77852 | Deanville | Burleson County | 16 | 99 | – | – |
| 77853 | Dime Box | Lee County | 884 | 15 | $60k | $129k |
| 77855 | Flynn | Leon County | 165 | 12 | – | – |
| 77856 | Franklin | Robertson County | 5,515 | 15 | $95k | $318k |
| 77857 | Gause | Milam County | 1,078 | 11 | $63k | $356k |
| 77859 | Hearne | Robertson County | 7,532 | 48 | $53k | $160k |
| 77861 | Iola | Grimes County | 3,065 | 27 | $67k | $233k |
| 77862 | Kurten | Brazos County | PO Box or unique | – | – | – |
| 77863 | Lyons | Burleson County | 482 | 612 | – | – |
| 77864 | Madisonville | Madison County | 7,640 | 43 | $73k | $168k |
| 77865 | Marquez | Leon County | 1,510 | 10 | $67k | $187k |
| 77866 | Millican | Brazos County | no residents | 0 | – | – |
| 77867 | Mumford | Robertson County | 206 | 9 | $36k | <$10k |
| 77868 | Navasota | Grimes County | 18,416 | 66 | $68k | $215k |
| 77870 | New Baden | Robertson County | PO Box or unique | – | – | – |
| 77871 | Normangee | Leon County | 3,058 | 15 | $68k | $234k |
| 77872 | North Zulch | Madison County | 2,026 | 22 | $87k | $190k |
| 77873 | Richards | Montgomery County | 1,383 | 15 | $81k | $285k |
| 77875 | Roans Prairie | Grimes County | no residents | 0 | – | – |
| 77876 | Shiro | Grimes County | 34 | 7 | – | – |
| 77878 | Snook | Burleson County | 1,113 | 49 | $60k | $207k |
| 77879 | Somerville | Burleson County | 4,611 | 24 | $66k | $154k |
| 77880 | Washington | Washington County | 2,517 | 26 | $91k | $271k |
| 77881 | Wellborn | Brazos County | PO Box or unique | – | – | – |
| 77882 | Wheelock | Robertson County | no residents | 0 | – | – |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; GeoNames postal codes (CC BY 4.0) for codes without a residential area.