ZIP Code 77233 in Houston, TX

Data Last Updated: February 1, 2026
City:Houston, Texas
County:Harris County
Timezone:Central (GMT -06:00)
Local Time:9:40:50 AM
Population:No Population Data
Area Codes:281 / 346 / 621 / 713 / 832
Classification:PO Box
Coordinates:29.7632, -95.3633
Quick Link:
https://www.zip-codes.com/zip-code/77233/zip-code-77233.asp

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77233 - Houston, TX

ZIP Code 77233, Houston

Small Town Unique ZIP No Census Data
LocationHarris County, TX
Area0 sq mi Single Point
Delivery Points560 (116 businesses)
PO Boxes444
ZIP CreatedBefore Oct 2004
Enclosed InZIP Code 77051
Key Facts
  • This is a PO Box-only ZIP code located within Houston city limits
  • The facility maintains 444 PO Boxes for customer convenience
  • 116 businesses use this location for their mailing addresses
  • Street delivery for this area is provided through neighboring ZIP code 77051
  • The post office is located on Cullen Boulevard in the Sunnyside neighborhood
  • This ZIP code covers essentially no land area, serving as a postal facility designation

Postal Services

The facility supports 116 businesses and handles mail for customers throughout the Harris County area. Street delivery in the immediate vicinity is managed through the adjacent 77051 ZIP code, which encompasses this location. This arrangement is common in urban areas where dedicated PO Box facilities operate alongside traditional carrier routes.

Street Name Patterns

Single Street Location

Cullen Boulevard is the sole street address associated with this ZIP, representing the location of the PO Box facility itself rather than a delivery route.

Nearby Areas

Sunnyside Southeast Houston Sunnyside Gardens Cullen Park Apts Flower City

Business & Employment Statistics


ZIP Code 77233 supports both business and residential activity. According to the Business Census (2024), there are 5 business establishments, employing about 8 people with an annual payroll of $235,000.

# Residential Mailboxes:0Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:481Source: USPS
Single Family Delivery Units:0Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:5Source: CBP
1st Quarter Payroll:$51,000Source: CBP
Annual Payroll:$235,000Source: CBP
# of Employees:8Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 77233 is located in Harris County, Texas, within the Houston-Pasadena-The Woodlands, TX Metropolitan Statistical Area (CBSA 26420) and Texas's 9th Congressional District. This Metro area has a population of 5,946,800 people, about 0.00% of whom live in ZIP Code 77233. It covers 0 sq mi of land and a water area of 0 sq mi.

CBSA Name:Houston-Pasadena-The Woodlands, TXSource: Census
CBSA Number:26420Source: Census
CBSA Type:MetroSource: Census
CBSA Division:--Source: Census
CBSA Population:5,946,800Source: Census
MSA:Houston-Galveston-Brazoria, TX CMSASource: Census
Land Area:--Source: Census
Water Area:--Source: Census
Congressional District:09Source: USPS
Congressional Land Area:165.64 sq miSource: Census
PMSA:Houston, TX PMSASource: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:4835000Source: Census
Place Name:Houston city; TexasSource: Census

Adjacent & Nearby ZIP Codes


77234 | | 77231

Schools in ZIP Code 77233


We could not locate which school district 77233 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.

Harris County Juvenile Detention Center 1200 Congress St Ste 6500
Houston, TX 77002
District: UnknownNearby
School For Accelerated Lrn 1310 Prairie Ste 1080
Houston, TX 77002
District: Spring Independent School DistrictNearby
Kinder H S For Performing And Visual Arts 790 Austin St
Houston, TX 77002
District: Houston Independent School DistrictNearby
Leonel Castillo Early Childhood Stem Academy 2101 S St
Houston, TX 77009
District: UnknownNearby
Heritage Classical Academy School 602 Sawyer Street Ste 720
Houston, TX 77007
District: UnknownNearby
Cathedral House Episcipol School 1112 Prairie St
Houston, TX 77002
District: Private SchoolNearby
Incarnate Word Academy 609 Crawford St
Houston, TX 77002
District: Private SchoolNearby
Our Lady Of Guadalupe School 2405 Navigation Blvd
Houston, TX 77003
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 77233


University Of Houston-Downtown 1 Main Street
Houston, TX 77002-1014
Type: Post Secondary
South Texas College Of Law Houston 1303 San Jacinto Street
Houston, TX 77002-7006
Type: Post Secondary
Houston Community College 3100 Main Street
Houston, TX 77002
Type: Post Secondary
University Of St Thomas 3800 Montrose Blvd
Houston, TX 77006-4696
Type: Post Secondary
Texas Southern University 3100 Cleburne St
Houston, TX 77004
Type: Post Secondary
University Of Houston 4302 University Drive, Room 212
Houston, TX 77204-2018
Type: Post Secondary

Sources & References


Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.

  1. U.S. Postal Service [Last Updated: 2/1/2026], https://www.usps.com
  2. ZIP-Codes.com Proprietary Data Enhancements [Updated: 2/1/2026], https://www.zip-codes.com
  3. U.S. Census [Updated: Varies], https://www.census.gov
    • U.S. Census Office of Management and Budget [Updated: As Released]
    • U.S. Census 2020 Demographic & Housing Characteristics (DHC) [Decennial] [Updated: 5/25/2023]
    • U.S. Census 2011-2024 American Community Survey 5-year estimates (ACS) [Annually] [Updated: Annually, As Released]
    • U.S. Census Business Patterns (CBD) [Annually] [Updated: Annually, As Released]
    • U.S. Census American National Standards Institute (ANSI) [Updated: As Released]
  4. U.S. Geological Survey [Updated: Varies], https://www.usgs.gov
  5. Centers for Medicare & Medicaid Services [Updated: Annually, As Released], https://www.cms.gov
  6. National Center for Education Statistics [Updated: 2/1/2026], https://nces.ed.gov