ZIP Code 85336 in San Luis, AZ

Data Last Updated: January 1, 2026
City:San Luis, Arizona
City Alias:Gadsden
County:Yuma County
Timezone:Mountain (GMT -07:00)
Local Time:10:08:12 PM
Population:7,810 [See All]
Area Code:928
Classification:PO Box
Coordinates:32.5281, -114.7747
Land Area:9.783 sq mi
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85336 San Luis, AZ - Arizona's Southwestern Gateway

ZIP Code 85336, San Luis

Border Hub
LocationYuma County, AZ
Area33.4 sq mi
Population7,810
Households2,060
PO Boxes198 Low Adoption (10%)
Median Age31.6 years
ZIP CreatedBefore Oct 2004
Key Facts
  • With 7,810 residents, San Luis is one of the most populated ZIP codes classified as PO Box only, placing it in the top 5% nationally
  • Despite being a PO Box Only Zone, the post office operates one city carrier route and two rural carrier routes serving 213 streets
  • Just 198 PO Boxes serve 2,060 households, a 9.6% adoption rate showing most residents receive rural route delivery instead
  • Transportation and warehousing employ 2,343 workers (30% of the workforce), reflecting San Luis's role as a border logistics hub
  • Median age of 31.6 years and a population-to-household ratio of 3.79 indicate a young community with larger families
  • USPS recognizes both San Luis and Gadsden as valid city names for this ZIP code, preserving the historic settlement name

A Border Community

San Luis sits at Arizona's southwestern corner, directly across the border from San Luis Rio Colorado, Sonora, Mexico. With 7,810 residents, this is one of the most populated communities designated as a PO Box ZIP code. The city name appears twice in the official postal records: San Luis (primary) and Gadsden (alternate), though both names point to the same post office.

Delivery in a PO Box Only Zone

This is a PO Box Only Zone. There's no alternative mail delivery across the 33-square-mile territory. Despite this classification, the USPS operates limited street delivery here. One city carrier route and two rural carrier routes serve 213 streets, mostly in residential subdivisions. The post office maintains just 198 PO Boxes for 2,060 households, a 9.6% adoption rate that's unusually low for a PO Box Only Zone. Most residents receive mail via rural route delivery to their homes.

Street Names and Community Identity

Street names tell the story of a binational community. Main Street (both North and South sections) carries the most delivery points with 57 records total. Spanish names dominate the landscape: San Luis Lane, Juan Sanchez Boulevard, Los Olivos Drive, San Pedro Street, Cesar Chavez Street. Historic figures appear alongside geographic references: E Udall Lane, E Kennedy Lane, Rio Sonora Street. The Gadsden street name honors the 1853 Gadsden Purchase that brought this region into U.S. territory.

A Young, Growing Community

With a median age of 31.6 years, San Luis is a young community. Just 3.9% of the population is 65 or older (305 people), while families with children are the norm. The population-to-household ratio of 3.79 indicates larger families, common in border communities. Racial composition shows the city's diverse character: 82% identify with races other than the standard census categories, reflecting the fluid nature of identity in a border region.

Border Logistics Economy

Transportation and warehousing dominate the local economy. 2,343 workers (about 30% of the workforce) work in this sector, a clear indicator of San Luis's role as a border logistics hub. The San Luis Port of Entry handles commercial and passenger traffic between the United States and Mexico. Educational attainment runs low at 15.6% with bachelor's degrees, though median household income of $58,314 sits near Arizona's median for small communities.

Neighborhoods Served

Nearby neighborhoods with Spanish names cluster around the post office: Bienestar Estates sits 0.2 miles away, while Las Fuentes and Las Villas De San Luis spread across subdivisions 2.6 to 2.8 miles distant. These communities receive mail through this ZIP code despite their distance from the central post office, highlighting the regional service pattern common in border areas.

Mailing Information

For mailing purposes, both "San Luis, AZ 85336" and "Gadsden, AZ 85336" are valid address formats. USPS recognizes Gadsden as an official alias, added to the database in November 2019. The dual naming preserves both the current city identity and the historic settlement name. PO Boxes remain available for those who prefer centralized mail pickup, though rural route delivery has become the primary method for most residents.

Street Name Patterns

Spanish Names Historic Names Numbered Grid

Street names blend Spanish heritage (San Luis Ln, Juan Sanchez Blvd, Cesar Chavez St) with American historic figures (Udall, Kennedy) and a numbered grid system (4th Ave, 9th Ave).

Nearby Areas

Bienestar Estates Las Fuentes Las Villas De San Luis Las Villas De San Luis Phase 2 Las Villas De San Luis Phase 1
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Population & Demographics


ZIP Code 85336 has 7,810 residents and 2,060 households (average 3.78 persons per household). The median age is 31.6 years, significantly younger than the state (38.9) and significantly younger than the nation (38.8). The gender split is 48.2% male and 51.8% female, which is slightly lower than the state male share (49.5%), making this a female-majority area. Largest groups are Hispanic or Latino (98.4%) and Other / Two or More Races (40.9%, much higher than the state average of 12.6% and well above the national average of 8.4%); Hispanic or Latino residents make up 98.4%, which is much higher than the national average (18.7%), and Other / Two or More Races share is much higher than both the state (12.6%) and national averages (8.4%).

Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2024 American Community Survey (ACS) 5-Year Estimates.
2020 Population:7,810Source: Census DHC
2024 ACS Population Estimate:7,884Source: Census ACS
2026 ZC Population Estimate:0Source: ZIP-Codes.com
Population Density:798.3 people per sq mile
Average Income:$58,314Source: Census ACS
Households:2,060Source: Census DHC
Average House Value:$198,000Source: Census ACS
Persons Per Household:3.78Source: Census DHC
Average Family Size:3.00Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)


Group20102011210220132014201520162017201820192020202120222023
Census ACS Population Estimate--50253756071457955850244151087310,3189,7807,884
Decennial Census700------------------7,810------
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Population by Age & Gender (Total, Male, Female)


Median Age: 31.6

Male Median Age: 29

Female Median Age: 33.7

Group< 55-910-1415-1920-2425-2930-3435-3940-4445-4950-5455-5960-6465-6970-7475-7980-8485+
Male30535041737024524819826915320822326917413478484138
Female31229130937426524929725019528536627819014991625128
Total6176417267445104974955193484935895473642831691109266
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Population by Race


White:1,63913.00%
Black:70.06%
Hispanic:*7,68560.97%
Asian:20.02%
American Indian:700.56%
Hawaiian:40.03%
Other:3,19825.37%
Total:12,605100%
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)
* NOTE: Hispanic or Latino is an ethnicity, not a race. This means individuals who identify as Hispanic will also be included in one of the race categories (such as White or Black). As a result, the totals shown here may exceed 100% when Hispanic is displayed alongside racial groups.

Gender Breakdown


GenderCount%Median Age
Males:3,76848.25%29.0 years
Females:4,04251.75%33.7 years
Total:7,810100%31.6 years
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship


Native, born in the United States:4,03751.20%
Native, born in PR, Island Areas, or abroad:270.34%
Foreign born, naturalized U.S. citizen:1,39117.64%
Foreign born, not a U.S. citizen:2,42948.45%
Total Population:7,884100%
Total Native Population:4,06451.55%
Total Foreign-born Population:3,82048.45%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS
Note: Nativity and Citizenship derived from American Community Survey (ACS) 5-year estimates. Total Population listed here will not match official ZIP Code population totals, which are based on the Decennial Census.

Income & Employment


In 2023, the Median household income is $58,314, which is far less than the national median ($78,538), is up $29,728 (104.0%) since 2011 and above its 2019 pre-pandemic level by $14,043. Family households earn a median of $45,571 versus $0 for nonfamily households (a difference of $45,571). By gender, male median income is $45,673 and female is $37,797, which is considerably lower than the national female median ($53,445), with a current gap of $7,876 that has stayed about the same from 2011 to 2023. The labor-force participation rate is 62.7%, which is a bit higher than the state rate (60.5%). The unemployment rate is 10.6%, which is much higher than the state rate (5.1%). The largest occupation group is Service (24.1%).

Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. Using data from Tables DP02, DP03, DP04 and DP05.

Median Income Over Time (Household, Family, Nonfamily, Male, Female)


Income Type2011201220132014201520162017201820192020202120222023
Median Household Income$28,586$29,708$29,083$30,000$0$38,393$31,105$32,351$44,271$36,311$39,161$45,305$58,314
Median Family Income$26,650$29,375$27,885$31,154$38,333$45,417$31,424$40,568$44,271$36,311$38,224$41,440$45,571
Median NonFamily Income$0$0$0$0$0$0$0$0$0$0$0$63,097$0
Median Male Income$26,700$27,404$26,611$27,000$35,625$27,353$40,125$43,654$32,016$33,846$34,514$39,268$45,673
Median Female Income$18,611$15,000$19,750$19,338$18,000$22,321$20,739$19,700$23,958$36,134$34,275$35,595$37,797
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Average Household Income


Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment Status


Employed:3,11856.05%
Unemployed:3706.65%
Not In Labor Force:2,07537.30%
Total:5,563100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment by Occupation (Civilian Employed Population, 16 and Over)


Management, business, science, and arts:63920.49%
Service:75024.05%
Sales and Office:45214.50%
Natural resources, construction, and maintenance:64720.75%
Production, transportation, and material moving:63020.21%
Total Civilian Employed Population:3,118100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS.

Housing & Affordability


In 2023, the median home value is $198,000, which is well under the state median ($358,900), is up $43,500 (28.16%) since 2011 and above its 2019 pre-pandemic level by $69,300. The median gross rent is $837, which is much lower than the state median ($1,431), is up $489 (140.52%) since 2011 and below its 2019 pre-pandemic level by $93. Of occupied housing, owners make up 56.03% (76.48% with a mortgage, 23.52% free-and-clear) and renters 43.97% - making this ZIP Code less home ownership than the state and higher than national rental averages. The vacancy rate is 1.30%, which is markedly below the state rate (11.00%).

Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy

Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. Using data from Table DP03, SELECTED ECONOMIC CHARACTERISTICS.

Median Home Value (Comparison)


Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time


Group2011210220132014201520162017201820192020202120222023
Median Home Value$154,500$152,900$110,200$120,300$0$0$91,100$93,300$128,700$131,700$153,500$183,700$198,000
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid


Less than $500:30326.63%
$500 to $999:46941.21%
$1,000 to $1,499:32328.38%
$1,500 to $1,999:00.00%
$2,000 to $2,499:00.00%
$2,500 to $2,999:00.00%
$3,000 or more:00.00%
No Rent:433.78%
Total:1,138100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time


Group2011210220132014201520162017201820192020202120222023
Median Rent$348$336$569$576$583$583$710$823$930$427$691$860$837
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy


Owner Occupied (with mortgage):1,10942.85%
Owner Occupied (free and clear, no mortgage):34113.18%
Renter Occupied:1,13843.97%
Total Occupied Housing Units:2,588100%

Occupied Housing Units:2,58898.70%
Vacant Housing Units (not graphed):341.30%
Total Housing Units:2,622100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Housing Type (Single-Family, Multi-Family, Other)


Single-Family Units:1,85170.59%
Multi-Family Units:47718.19%
Other Units:29411.21%
Total Housing Units:2,622100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community


In 2023, 15.60% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.00%). High school or higher is 56.30%, which is far lower than the national rate (89.40%). The uninsured rate is 21.70%, which is far higher than the national rate (8.60%). Private coverage is 35.00%, which is falls below the national rate (67.30%). Public coverage is 47.00%, which is well above the national rate (36.30%). The share of people in poverty is 22.70%, which is far higher than the national rate (8.70%), down 16.50 percentage points since 2011 and below its 2019 pre-pandemic level by 0.70 percentage points. This points to a pronounced improvement in local conditions - rising incomes, firmer consumer demand, and a stronger tax base. Among residents ages 3+, the largest enrollment group is elementary (50.08%). College enrollment is 16.97%, which is far lower than the national rate (26.70%), indicating the community may be more oriented toward vocational/trade or direct-to-workforce opportunities.

Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment

Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. Using data from Tables DP02 and DP03.

Educational Attainment of Adults (25 and Older)


Less than 9th grade:1,13926.25%
9th to 12th grade, no diploma:75817.47%
High school graduate (includes equivalency):84319.43%
Some college, no degree:66215.26%
Associate's degree:2585.95%
Bachelor's degree:56212.95%
Graduate or professional degree:1172.70%
Total:4,339100%
High school or higher:2,44256.28%
Bachelor's degree or higher:67915.65%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Health Insurance Coverage by Type (Private, Public, Uninsured)


Private Insurance:2,75633.72%
Public Insurance:3,70845.37%
No Insurance:1,70920.91%
Total:8,173100%
Has Health Insurance:6,46479.09%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Percentage of People in Poverty Over Time (2011-2024)


Group2011210220132014201520162017201820192020202120222023
% of People in Poverty39.2%32.9%25.3%18.1%19.9%24.2%31.5%29.0%23.4%12.4%26.2%25.3%22.7%
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

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.

School Enrollment by Education Level (Ages 3 and Older)


Nursery School, Preschool:933.80%
Kindergarten:1797.32%
Elementary school (grades 1-8):1,22550.08%
High school (grades 9-12):53421.83%
College or graduate school:41516.97%
Total:2,446100%
Early Childhood:27211.12%
K-12 (Primary & Secondary School):1,93879.23%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Business & Employment Statistics


ZIP Code 85336 supports both business and residential activity. According to the Business Census (2024), there are 68 business establishments, employing about 298 people with an annual payroll of $8,823,000.

# Residential Mailboxes:0Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:9,335Source: USPS
Single Family Delivery Units:0Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:68Source: CBP
1st Quarter Payroll:$2,130,000Source: CBP
Annual Payroll:$8,823,000Source: CBP
# of Employees:298Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 85336 is located in Yuma County, Arizona, within the Yuma, AZ Metropolitan Statistical Area (CBSA 49740) and Arizona's 7th Congressional District. This Metro area has a population of 207,685 people, about 3.76% of whom live in ZIP Code 85336. It covers 9.783 sq mi of land and a water area of 0.068 sq mi.

CBSA Name:Yuma, AZSource: Census
CBSA Number:49740Source: Census
CBSA Type:MetroSource: Census
CBSA Division:--Source: Census
CBSA Population:207,685Source: Census
MSA:Yuma, AZ MSASource: Census
Land Area:9.783 sq miSource: Census
Water Area:0.068 sq miSource: Census
Congressional District:07Source: USPS
Congressional Land Area:205.12 sq miSource: Census
PMSA:--Source: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:0463470Source: Census
Place Name:San Luis city; ArizonaSource: Census

Adjacent & Nearby ZIP Codes


85337 | | 85335

Schools in ZIP Code 85336


ZIP Code 85336 is in the Gadsden Elementary District, which serves grades Pre-Kindergarten thru 8th. There are 1 public school(s) in this ZIP Code, and we have located 3 private school(s). It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.

Gadsden Elementary School 18745 S. Gadsden Street
Gadsden, AZ 85336
District: Gadsden Elementary District
Yuma Catholic High School 2100 W 28th St
Yuma, AZ 85364
District: Private SchoolNearby
St Francis Of Assisi School 700 W 18th St
Yuma, AZ 85364
District: Private SchoolNearby
Immaculate Conception Elementary School 501 S Ave B
Yuma, AZ 85364
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 85336


Regional Center For Border Health 950 E. Main St Building A
Somerton, AZ 85350
Type: Post Secondary
Arizona State University - Yuma 2020 South Avenue Eight East
Yuma, AZ 85365-6900
Type: Post Secondary
Arizona Western College 2020 S. Avenue 8e
Yuma, AZ 85365-8834
Type: Post Secondary
San Diego State University-Imperial Valley Campus 720 Heber Ave
Calexico, CA 92231
Type: Post Secondary
Imperial Valley College 380 E. Aten Road
Imperial, CA 92251-0158
Type: Post Secondary
Columbia College - Imperial 380 E. Aten Road
Imperial, CA 92251-0158
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 January 1, 2026.

  1. U.S. Postal Service [Last Updated: 1/1/2026], https://www.usps.com
  2. ZIP-Codes.com Proprietary Data Enhancements [Updated: 1/1/2026], 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: 1/1/2026], https://nces.ed.gov