| City: | Galveston, Texas |
| Names to Avoid: | U Of T Med Br At Galveston |
| County: | Galveston County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 9:44:03 AM |
| Population: | 9 [See All] |
| Area Code: | 409 |
| Classification: | Unique [Company/Government] |
| Coordinates: | 29.3108, -94.7773 |
| Land Area: | 0.023 sq mi |
| Quick Link: |
The University of Texas Medical Branch at Galveston, founded in 1891 as the oldest medical school in Texas, operates under dedicated ZIP code 77555. UTMB is a major public academic health science center within the University of Texas System, with schools of Medicine, Nursing, Health Professions, Public and Population Health, and Graduate Biomedical Sciences. The institution employs approximately 11,000 people and has a $4.9 billion annual statewide economic impact.
The compact 0.01-square-mile postal boundary encompasses the core UTMB Galveston campus, located in the University of Texas Medical Branch neighborhood approximately 45 miles from Houston. Postal records show 42 delivery codes routing correspondence to facilities identified as University of Texas and UTMB Galveston on University Boulevard. This centralized mail operation supports the hospital, medical school, and research facilities on Galveston Island.
UTMB houses the Galveston National Biocontainment Laboratory, one of the few non-military Biosafety Level 4 facilities in the nation, where researchers study highly infectious diseases. Census County Business Patterns reports 16 establishments and 7,297 employees within this ZIP code, reflecting the major employer status of this institution in Galveston County.
The 2020 Census counted just 9 residents within this ZIP code, with a median age of 45.5 years and 2 renter-occupied housing units. The minimal residential population reflects this designation's focus on institutional and medical operations rather than housing. This postal designation has served UTMB since before 2004. Galveston is the valid mailing city, and the ZIP falls within Texas Congressional District 14.
| Population: | 9 |
| Median Age: | 45.5 |
| Housing Units: | 2 |
| Establishments: | 16 |
| Employment: | 7,297 |
Buildings registered in the USPS ZIP+4 database with designated codes for direct mail delivery.
ZIP Code 77555 has 9 residents and 2 households (average 4.50 persons per household). The median age is 45.5 years, significantly older than the state (35.6) and older than the nation (38.8). The gender split is 55.6% male and 44.4% female, which is higher than the national male share (49.1%), making this a male-majority area. Largest groups are White (77.8%, much higher than the state average of 50.1% and well above the national average of 61.6%) and American Indian & Alaska Native (11.1%, much higher than the state average of 1.0% and well above the national average of 1.1%); Hispanic or Latino residents make up 0.0%, which is much lower than the state average (39.3%), and American Indian & Alaska Native share is much higher than the state average (1.0%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 9Source: Census DHC |
| 2024 ACS Population Estimate: | 2Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 391.3 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 2Source: Census DHC |
| Average House Value: | $666,666,666Source: Census ACS |
| Persons Per Household: | 4.50Source: Census DHC |
| Average Family Size: | 0.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 2 | 2 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 9 | -- | -- | -- | -- |
Median Age: 45.5
Male Median Age: 66.5
Female Median Age: 27.5
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 1 |
| Female | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 1 |
| White: | 7 | 77.78% |
| Black: | 0 | 0% |
| Hispanic:* | 0 | 0% |
| Asian: | 0 | 0% |
| American Indian: | 1 | 11.11% |
| Hawaiian: | 0 | 0% |
| Other: | 1 | 11.11% |
| Total: | 9 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 5 | 55.56% | 66.5 years |
| Females: | 4 | 44.44% | 27.5 years |
| Total: | 9 | 100% | 45.5 years |
| Native, born in the United States: | 2 | 100.00% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 0 | 0.00% |
| Foreign born, not a U.S. citizen: | 0 | 0.00% |
| Total Population: | 2 | 100% |
| Total Native Population: | 2 | 100.00% |
| Total Foreign-born Population: | 0 | 0.00% |
In 2024, the Median household income is $0, which is well under the national median ($78,538), and above its 2019 pre-pandemic level by $0. Family households earn a median of $0 versus $0 for nonfamily households (a difference of $0). By gender, male median income is $0 and female is $0, which is considerably lower than the national female median ($53,445), with a current gap of $0 that has stayed about the same from 2011 to 2024. The labor-force participation rate is 0.0%, which is far less than the national rate (63.5%).
Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Family Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median NonFamily Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Male Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Female Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Employed: | 0 | 0.00% |
| Unemployed: | 0 | 0.00% |
| Not In Labor Force: | 2 | 100.00% |
| Total: | 2 | 100% |
| Management, business, science, and arts: | 0 | 0% |
| Service: | 0 | 0% |
| Sales and Office: | 0 | 0% |
| Natural resources, construction, and maintenance: | 0 | 0% |
| Production, transportation, and material moving: | 0 | 0% |
| Total Civilian Employed Population: | 0 | 100% |
In 2024, 0.00% of adults (25+) have a bachelor's degree or higher, which is comparable to the national rate (35.00%). High school or higher is 50.00%, which is comparable to the national rate (89.40%). The uninsured rate is -666,666,666.00%, which is far lower than the national rate (8.60%). Private coverage is -666,666,666.00%, which is far lower than the national rate (67.30%). Public coverage is -666,666,666.00%, which is far lower than the national rate (36.30%). The share of people in poverty is -666,666,666.00%, which is far lower than the national rate (8.70%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Insufficient data for school enrollment.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 0 | 0.00% |
| 9th to 12th grade, no diploma: | 1 | 50.00% |
| High school graduate (includes equivalency): | 1 | 50.00% |
| Some college, no degree: | 0 | 0.00% |
| Associate's degree: | 0 | 0.00% |
| Bachelor's degree: | 0 | 0.00% |
| Graduate or professional degree: | 0 | 0.00% |
| Total: | 2 | 100% |
| High school or higher: | 1 | 50.00% |
| Bachelor's degree or higher: | 0 | 0.00% |
| Private Insurance: | 0 | 0% |
| Public Insurance: | 0 | 0% |
| No Insurance: | 0 | 0% |
| Total: | 0 | 100% |
| Has Health Insurance: | 0 | 0% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 0 | 0% |
| Kindergarten: | 0 | 0% |
| Elementary school (grades 1-8): | 0 | 0% |
| High school (grades 9-12): | 0 | 0% |
| College or graduate school: | 0 | 0% |
| Total: | 0 | 100% |
| Early Childhood: | 0 | 0% |
| K-12 (Primary & Secondary School): | 0 | 0% |
ZIP Code 77555 supports both business and residential activity. According to the Business Census (2024), there are 16 business establishments, employing about 7,742 people with an annual payroll of $488,033,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 3,128Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 16Source: CBP |
| 1st Quarter Payroll: | $123,515,000Source: CBP |
| Annual Payroll: | $488,033,000Source: CBP |
| # of Employees: | 7,742Source: CBP |
ZIP Code 77555 is located in Galveston County, Texas, within the Houston-Pasadena-The Woodlands, TX Metropolitan Statistical Area (CBSA 26420) and Texas's 14th Congressional District. This Metro area has a population of 5,946,800 people, about 0.00% of whom live in ZIP Code 77555. It covers 0.023 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: | 0.023 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 14Source: USPS |
| Congressional Land Area: | 2441.39 sq miSource: Census |
| PMSA: | Galveston-Texas City, TX PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 4828068Source: Census |
| Place Name: | Galveston city; TexasSource: Census |
We could not locate which school district 77555 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.
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.