Plain

County ZIP codes · Texas · FIPS 48167

Galveston County, TX ZIP Codes

Galveston County, Texas has 24 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 19 residential and 5 for PO boxes or a single organization. 18 of the residential ones lie mainly in Galveston County and 1 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $45,047 in 77550 (Galveston) to $123,756 in 77546 (Friendswood) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Galveston County?

77510 · Santa Fe: $103k77511 · Alvin: $75k77517 · Santa Fe: $89k77518 · Bacliff: $52k77539 · Dickinson: $89k77546 · Friendswood: $124k77550 · Galveston: $45k77551 · Galveston: $58k77554 · Galveston: $87k77555 · Galveston: –77563 · Hitchcock: $76k77565 · Kemah: $95k77568 · La Marque: $75k77573 · League City: $123k77590 · Texas City: $66k77591 · Texas City: $69k77617 · Gilchrist: $76k77623 · High Island: $88k77650 · Port Bolivar: $62k77554775117765077563775397756877573775907751077517775467761777623775917755077565775517751877510 · Santa Fe: $103k77511 · Alvin: $75k77517 · Santa Fe: $89k77518 · Bacliff: $52k77539 · Dickinson: $89k77546 · Friendswood: $124k77550 · Galveston: $45k77551 · Galveston: $58k77554 · Galveston: $87k77555 · Galveston: –77563 · Hitchcock: $76k77565 · Kemah: $95k77568 · La Marque: $75k77573 · League City: $123k77590 · Texas City: $66k77591 · Texas City: $69k77617 · Gilchrist: $76k77623 · High Island: $88k77650 · Port Bolivar: $62k7755477511776507756377539775687757377510775467761777623775917755077510 · Santa Fe: $103k77511 · Alvin: $75k77517 · Santa Fe: $89k77518 · Bacliff: $52k77539 · Dickinson: $89k77546 · Friendswood: $124k77550 · Galveston: $45k77551 · Galveston: $58k77554 · Galveston: $87k77563 · Hitchcock: $76k77565 · Kemah: $95k77568 · La Marque: $75k77573 · League City: $123k77590 · Texas City: $66k77591 · Texas City: $69k77617 · Gilchrist: $76k77623 · High Island: $88k77650 · Port Bolivar: $62k77554775117765077563775397756877573
The residential ZIP codes of Galveston County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$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 its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $68,593 and $89,111.

They carry 14 postal town names.

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

All 19 residential ZIP codes in Galveston County

18 ZIP codes lie mainly in Galveston County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Galveston County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
77573 League City 98,109 3,288 $123k $368k 100%
77546 Friendswood 54,789 2,014 $124k $381k 67%
77539 Dickinson 49,375 1,020 $89k $265k 100%
77590 Texas City 31,642 1,256 $66k $189k 100%
77550 Galveston 23,489 3,107 $45k $326k 100%
77568 La Marque 23,083 1,576 $75k $230k 100%
77551 Galveston 21,696 5,487 $58k $291k 100%
77591 Texas City 18,294 1,773 $69k $223k 100%
77510 Santa Fe 14,155 465 $103k $333k 94%
77554 Galveston 10,414 335 $87k $467k 100%
77563 Hitchcock 9,955 225 $76k $221k 100%
77518 Bacliff 9,541 2,944 $52k $202k 100%
77565 Kemah 6,943 1,948 $95k $419k 100%
77517 Santa Fe 5,529 211 $89k $314k 75%
77650 Port Bolivar 2,322 106 $62k $352k 100%
77623 High Island 585 40 $88k – 100%
77617 Gilchrist 44 8 $76k – 100%
77555 Galveston 2 87 – – 100%

Partly in Galveston County

Residential ZIP codes mainly in another county that reach at least 1% into Galveston County, by their share here
In this county
77511 Alvin 51,892 346 $75k $236k 13%

Download the 24 ZIP codes as CSV

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 Galveston County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Galveston County and in the neighboring counties
ZIPIn GalvestonElsewhere
7754667%Harris County31%; Brazoria County2%
7751113%Brazoria County87%
7751094%Brazoria County6%
7751775%Brazoria County25%

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

PO Box and single-organization ZIP codes

ZIP codes in Galveston County without a residential area (GeoNames postal codes)
ZIPPostal name
77549Friendswood
77552Galveston
77553Galveston
77574League City
77592Texas City

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Galveston County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Galveston County's ZIP codes use 2 prefixes: 775 and 776.

Three-digit prefixes of Galveston County'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 Galveston County's
PrefixSectional centerHereAll codes
775North Houston, TX (SCF 773)2171
776Beaumont, TX (SCF 776)336

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