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County ZIP codes · Texas · FIPS 48407

San Jacinto County, TX ZIP Codes

San Jacinto County, Texas has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 5 of the residential ones lie mainly in San Jacinto County and 3 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $55,663 in 77320 (Huntsville) to $83,594 in 77371 (Shepherd) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of San Jacinto County?

77320 · Huntsville: $56k77328 · Cleveland: $62k77331 · Coldspring: $62k77358 · New Waverly: $60k77359 · Oakhurst: $56k77364 · Pointblank: $63k77371 · Shepherd: $84k77378 · Willis: $71k773207733177328773587737177378773597736477320 · Huntsville: $56k77328 · Cleveland: $62k77331 · Coldspring: $62k77358 · New Waverly: $60k77359 · Oakhurst: $56k77364 · Pointblank: $63k77371 · Shepherd: $84k77378 · Willis: $71k7732077331773287735877371773787735977320 · Huntsville: $56k77328 · Cleveland: $62k77331 · Coldspring: $62k77358 · New Waverly: $60k77359 · Oakhurst: $56k77364 · Pointblank: $63k77371 · Shepherd: $84k77378 · Willis: $71k77320773317732877358773717737877364
The residential ZIP codes of San Jacinto 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 $62,321 and $62,750.

They carry 8 postal town names: Huntsville, Willis, Cleveland, Shepherd, Coldspring, New Waverly, Pointblank, Oakhurst.

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

All 8 residential ZIP codes in San Jacinto County

5 ZIP codes lie mainly in San Jacinto County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in San Jacinto County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
77328 Cleveland 17,208 95 $62k $190k 70%
77371 Shepherd 7,800 66 $84k $195k 100%
77331 Coldspring 7,556 44 $62k $246k 100%
77364 Pointblank 2,178 71 $63k $233k 100%
77359 Oakhurst 683 16 $56k – 100%

Partly in San Jacinto County

Residential ZIP codes mainly in another county that reach at least 1% into San Jacinto County, by their share here
In this county
77378 Willis 17,629 198 $71k $200k 40%
77358 New Waverly 5,087 46 $60k $238k 22%
77320 Huntsville 38,152 111 $56k $203k 6%

Download the 8 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 San Jacinto County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in San Jacinto County and in the neighboring counties
ZIPIn San JacintoElsewhere
773206%Walker County 94%
7737840%Montgomery County 61%
7732870%Montgomery County 22%; Liberty County 8%
7735822%Walker County 72%; Montgomery County 6%

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

Which first three digits do San Jacinto County'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 San Jacinto County starts with 773.

Three-digit prefixes of San Jacinto 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 San Jacinto County's
PrefixSectional centerHereAll codes
773 North Houston, TX (SCF 773) 8 73

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