County ZIP codes · Texas · FIPS 48471

Walker County, TX ZIP Codes

Walker County, Texas has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 11 residential and 4 for PO boxes or a single organization. 7 of the residential ones lie mainly in Walker County and 4 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $48,538 in 77340 to $55,663 in 77320 (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Walker County?

The residential ZIP codes of Walker 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?

77340 · $49k 77320 · $56k

They carry 8 postal town names: Huntsville, Trinity, New Waverly, Bedias, Midway, Richards, Riverside, Dodge.

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

All 11 residential ZIP codes in Walker County

7 ZIP codes lie mainly in Walker County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Walker County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
77320	Huntsville	38,152	111	$56k	$203k	94%
77340	Huntsville	37,517	176	$49k	$244k	100%
77358	New Waverly	5,087	46	$60k	$238k	72%
77367	Riverside	446	522	–	–	100%
77334	Dodge	197	14	–	–	100%
77341	Huntsville	no residents	0	–	–	100%
77342	Huntsville	no residents	0	–	–	100%

Partly in Walker County

Residential ZIP codes mainly in another county that reach at least 1% into Walker County, by their share here
						In this county
75852	Midway	3,323	22	$73k	$214k	22%
77831	Bedias	3,676	16	$58k	$195k	22%
75862	Trinity	9,968	41	$52k	$124k	21%
77873	Richards	1,383	15	$81k	$285k	21%

Download the 15 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?

6 ZIP codes of Walker County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Walker County and in the neighboring counties
ZIP	In Walker	Elsewhere
77320	94%	San Jacinto County 6%
75862	21%	Trinity County 79%
77358	72%	San Jacinto County 22%; Montgomery County 6%
77831	22%	Grimes County 77%; Madison County 1%
75852	22%	Madison County 78%
77873	21%	Montgomery County 44%; Grimes County 35%

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

PO Box and single-organization ZIP codes

ZIP codes in Walker County without a residential area (GeoNames postal codes)
ZIP	Postal name
77343	Huntsville
77344	Huntsville
77348	Huntsville
77349	Huntsville

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Walker County's ZIP codes use 3 prefixes: 758, 773 and 778.

Three-digit prefixes of Walker 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 Walker County's
Prefix	Sectional center	Here	All codes
758	Dallas, TX (SCF 752)	2	33
773	North Houston, TX (SCF 773)	11	73
778	North Houston, TX (SCF 773)	2	47

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