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City ZIP codes · Texas

Katy, TX ZIP Codes

6 ZIP codes use the postal name Katy, Texas (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 2 for PO boxes or a single organization. Median household income runs from $87,808 in 77449 to $148,720 in 77494, 1.7 times as much (Census Bureau, ACS 2020-2024). Katy's most populous ZIP code is 77494, with 140,157 people (ACS 2020-2024); 18% of its land is in the city of Katy.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Katy's ZIP codes?

77449: $88k median household income77450: $106k median household income77493: $119k median household income77494: $149k median household income7749377494774497745077449: $88k median household income77450: $106k median household income77493: $119k median household income77494: $149k median household income7749377494774497745077449: $88k median household income77450: $106k median household income77493: $119k median household income77494: $149k median household income77493774947744977450
The 4 residential ZIP codes named Katy, 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 Katy's ZIP codes?

The highest median household income is in 77494 ($148,720), the lowest in 77449 ($87,808). Home values run from $255,900 in 77449 to $476,200 in 77494.

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

All 4 residential ZIP codes of Katy

Residential ZIP codes with the postal name Katy, TX, largest first (ACS 2020-2024); sort by any column
County
77494 Fort Bend County 140,157 3,696 $149k $476k
77449 Harris County 130,028 4,809 $88k $256k
77450 Harris County 71,906 3,655 $106k $361k
77493 Harris County 71,484 1,157 $119k $358k

Download the 6 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).

PO Box and single-organization ZIP codes in Katy

2 ZIP codes named Katy have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Katy, TX: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
77491Harris County
77492Harris County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Katy's ZIP codes reach?

Katy's residential ZIP codes lie in 3 counties: Harris County (3 ZIP codes mainly there), Fort Bend County (1 ZIP code mainly there), Waller County (part of a ZIP code).

Which places do Katy's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Katy's residential ZIP codes cover Katy itself and 2 other places, 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 Katy'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 Katy starts with 774.

Three-digit prefixes of Katy'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 Katy's
PrefixSectional centerHereAll codes
774 South Houston, TX (SCF 774) 6 83

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