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City ZIP codes · Texas

Willis, TX ZIP Codes

2 ZIP codes use the postal name Willis, Texas (Census 2020 ZCTAs and GeoNames postal codes, October 2026), all residential. Median household income runs from $71,143 in 77378 to $92,415 in 77318, 1.3 times as much (Census Bureau, ACS 2020-2024). Willis's most populous ZIP code is 77318, with 20,792 people (ACS 2020-2024); 0% of its land is in the city of Willis.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Willis's ZIP codes?

77318: $92k median household income77378: $71k median household income773787731877318: $92k median household income77378: $71k median household income773787731877318: $92k median household income77378: $71k median household income7737877318
The 2 residential ZIP codes named Willis, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Willis's ZIP codes?

The highest median household income is in 77318 ($92,415), the lowest in 77378 ($71,143). Home values run from $199,800 in 77378 to $316,900 in 77318.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 2 residential ZIP codes of Willis

Residential ZIP codes with the postal name Willis, TX, largest first (ACS 2020-2024); sort by any column
County
77318 Montgomery County 20,792 561 $92k $317k
77378 Montgomery County 17,629 198 $71k $200k

Download the 2 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

Which counties do Willis's ZIP codes reach?

Willis's residential ZIP codes lie in 2 counties: Montgomery County (2 ZIP codes mainly there), San Jacinto County (part of a ZIP code).

Which places do Willis's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Willis's residential ZIP codes cover Willis itself and 1 other place, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Willis'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 Willis starts with 773.

Three-digit prefixes of Willis's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Willis's
PrefixSectional centerHereAll codes
773 North Houston, TX (SCF 773) 2 73

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.