ZIP Code 51366 in Webb, IA

Data Last Updated: October 1, 2025
City:Webb, Iowa
Counties:Clay County[Primary]
Buena Vista County
Timezone:Central (GMT -06:00)
Local Time:7:21:11 PM
Population:377 [See All]
Area Code:712
Classification:Standard [Normal Street Delivery]
Coordinates:42.9672, -95.0158
Land Area:62.33 sq mi
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https://www.zip-codes.com/zip-code/51366/zip-code-51366.asp

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Population & Demographics


ZIP Code 51366 has 377 residents and 157 households (average 2.40 persons per household). The median age is 41.8 years, older than the state (38.6) and older than the nation (38.8). The gender split is 51.5% male and 48.5% female, which is slightly higher than the national male share (49.1%), making this a male-majority area. Largest groups are White (97.6%, much higher than the state average of 84.5% and well above the national average of 61.6%) and Hispanic or Latino (2.4%); Hispanic or Latino residents make up 2.4%, which is much lower than the national average (18.7%).

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

Source: U.S. Census 2020 Demographics & Housing Characteristics (DHC) and U.S. Census 2011-2023 American Community Survey (ACS) 5-Year Estimates.
2020 Population:377Source: Census DHC
2023 ACS Population Estimate:335Source: Census ACS
2025 ZC Population Estimate:254Source: ZIP-Codes.com
Population Density:6.0 people per sq mile
Average Income:$75,000Source: Census ACS
Households:157Source: Census DHC
Average House Value:$119,400Source: Census ACS
Persons Per Household:2.40Source: Census DHC
Average Family Size:2.73Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)


Group20102011210220132014201520162017201820192020202120222023
Census ACS Population Estimate--462398367355372343377294361336323303335
Decennial Census379------------------377------
Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

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


Median Age: 41.8

Male Median Age: 39.7

Female Median Age: 43.8

Group< 55-910-1415-1920-2425-2930-3435-3940-4445-4950-5455-5960-6465-6970-7475-7980-8485+
Male1414147125141895718121813563
Female15111411431114910912221112438
Total292528181682532181516303429259911
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Population by Race


White:36897.10%
Black:00%
Hispanic:*92.37%
Asian:00%
American Indian:00%
Hawaiian:00%
Other:20.53%
Total:379100%
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:19451.46%39.7 years
Females:18348.54%43.8 years
Total:377100%41.8 years
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship


Native, born in the United States:33299.10%
Native, born in PR, Island Areas, or abroad:30.90%
Foreign born, naturalized U.S. citizen:00.00%
Foreign born, not a U.S. citizen:00.00%
Total Population:335100%
Total Native Population:335100.00%
Total Foreign-born Population:00.00%
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 $75,000, which is lower than the national median ($78,538), is up $26,250 (53.8%) since 2011 and above its 2019 pre-pandemic level by $21,875. Family households earn a median of $120,391 versus $0 for nonfamily households (a difference of $120,391). By gender, male median income is $43,750 and female is $26,250, which is considerably lower than the national female median ($53,445), with a current gap of $17,500 that has widened from 2011 to 2023. The labor-force participation rate is 54.6%, which is far less than the state rate (66.5%). The unemployment rate is 0.0%, which is markedly below the national rate (5.2%). The largest occupation group is Management (42.6%).

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$48,750$50,417$50,694$50,417$44,167$46,250$46,953$49,474$53,125$61,250$62,813$76,667$75,000
Median Family Income$51,875$54,375$52,361$51,563$46,250$47,344$51,429$52,000$72,500$96,667$108,269$115,526$120,391
Median NonFamily Income$18,917$19,167$36,250$41,750$41,000$40,750$31,458$30,000$0$25,000$0$0$0
Median Male Income$26,974$30,000$32,031$40,208$0$36,375$35,208$36,000$39,615$53,500$0$43,281$43,750
Median Female Income$40,714$38,750$33,125$36,875$0$25,938$28,250$40,833$30,357$32,232$27,308$36,875$26,250
Source: U.S. Census 2011-2023 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:15554.58%
Unemployed:00.00%
Not In Labor Force:12945.42%
Total:284100%
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:6642.58%
Service:1811.61%
Sales and Office:63.87%
Natural resources, construction, and maintenance:74.52%
Production, transportation, and material moving:5837.42%
Total Civilian Employed Population:155100%
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 $119,400, which is far less than the national median ($303,400), is up $65,000 (119.49%) since 2011 and above its 2019 pre-pandemic level by $46,900. The median gross rent is $979, which is considerably lower than the national median ($1,348), is up $510 (108.74%) since 2011 and above its 2019 pre-pandemic level by $148. Of occupied housing, owners make up 85.51% (40.68% with a mortgage, 59.32% free-and-clear) and renters 14.49% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 13.21%, which is much higher than the state rate (8.65%).

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

Source: U.S. Census 2011-2023 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$54,400$61,500$61,100$60,400$66,900$64,000$67,400$68,700$72,500$101,600$102,300$111,500$119,400
Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid


Less than $500:00.00%
$500 to $999:840.00%
$1,000 to $1,499:525.00%
$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:735.00%
Total:20100%
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$469$507$521$563$544$534$0$0$831$0$908$0$979
Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy


Owner Occupied (with mortgage):4834.78%
Owner Occupied (free and clear, no mortgage):7050.72%
Renter Occupied:2014.49%
Total Occupied Housing Units:138100%

Occupied Housing Units:13886.79%
Vacant Housing Units (not graphed):2113.21%
Total Housing Units:159100%
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:15194.97%
Multi-Family Units:85.03%
Other Units:00.00%
Total Housing Units:159100%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community


In 2023, 13.50% 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 76.30%, which is on par with the state rate (93.20%). The uninsured rate is 5.70%, which is comparable to the national rate (8.60%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.70%), down 6.80 percentage points since 2011. 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 pre-K (37.50%). College enrollment is 33.33%, which is on par with the state rate (25.40%), meaning the community mirrors broader higher-education participation.

Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment

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

Educational Attainment of Adults (25 and Older)


Less than 9th grade:188.70%
9th to 12th grade, no diploma:3114.98%
High school graduate (includes equivalency):5526.57%
Some college, no degree:4019.32%
Associate's degree:3516.91%
Bachelor's degree:2210.63%
Graduate or professional degree:62.90%
Total:207100%
High school or higher:15876.33%
Bachelor's degree or higher:2813.53%
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:22258.12%
Public Insurance:14136.91%
No Insurance:194.97%
Total:382100%
Has Health Insurance:36395.03%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Percentage of People in Poverty Over Time (2011-2023)


Group2011210220132014201520162017201820192020202120222023
% of People in Poverty6.8%9.6%13.4%12.0%12.7%8.4%5.3%0.0%0.0%0.0%0.0%0.0%0.0%
Source: U.S. Census 2011-2023 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:937.50%
Kindergarten:00.00%
Elementary school (grades 1-8):14.17%
High school (grades 9-12):625.00%
College or graduate school:833.33%
Total:24100%
Early Childhood:937.50%
K-12 (Primary & Secondary School):729.17%
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Business & Employment Statistics


ZIP Code 51366 supports both business and residential activity. According to the Business Census (2023), there are 6 business establishments, employing about 8 people with an annual payroll of $383,000. USPS data shows 106 residential mailboxes and 0 business mailboxes, reflecting local delivery coverage.

# Residential Mailboxes:106Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:197Source: USPS
Single Family Delivery Units:106Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:6Source: CBP
1st Quarter Payroll:$72,000Source: CBP
Annual Payroll:$383,000Source: CBP
# of Employees:8Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 51366 is located in Clay County, Iowa, within the Spencer, IA Metropolitan Statistical Area (CBSA 43980) and Iowa's 4th Congressional District. This Micro area has a population of 16,446 people, about 2.29% of whom live in ZIP Code 51366. It covers 62.33 sq mi of land and a water area of 0.048 sq mi.

CBSA Name:Spencer, IASource: Census
CBSA Number:43980Source: Census
CBSA Type:MicroSource: Census
CBSA Division:--Source: Census
CBSA Population:16,446Source: Census
MSA:Source: Census
Land Area:62.33 sq miSource: Census
Water Area:0.048 sq miSource: Census
Congressional District:04Source: USPS
Congressional Land Area:22756.75 sq miSource: Census
PMSA:Source: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:1983010Source: Census
Place Name:Webb city; IowaSource: Census

Adjacent & Nearby ZIP Codes


51401 | | 51365

Schools in ZIP Code 51366


We could not locate which school district 51366 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.

Lincoln Elementary School 615 4th Ave. Sw
Spencer, IA 51301
District: Spencer Community School DistrictNearby
Spencer High School 800 E 3rd St
Spencer, IA 51301
District: Spencer Community School DistrictNearby
Spencer Middle School 1400 10th Avenue East
Spencer, IA 51301
District: Spencer Community School DistrictNearby
Johnson Elementary 724 West 9th Street
Spencer, IA 51301
District: Spencer Community School DistrictNearby
Fairview Park Elementary 1508 5th Ave. East
Spencer, IA 51301
District: Spencer Community School DistrictNearby
Iowa Great Lakes Lutheran School 1311 E 18th St
Spencer, IA 51301
District: Private SchoolNearby
Emmetsburg Catholic School 1903 Broadway St
Emmetsburg, IA 50536
District: Private SchoolNearby
Pocahontas Catholic School 305 Sw 3rd St
Pocahontas, IA 50574
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 51366


Buena Vista University 610 W 4th St
Storm Lake, IA 50588
Type: Post Secondary
Iowa Lakes Community College 19 S 7th St
Estherville, IA 51334-2295
Type: Post Secondary
Faust Institute Of Cosmetology-Spirit Lake 1543 18th Street
Spirit Lake, IA 51360
Type: Post Secondary
Northwest Iowa Community College 603 W Park St
Sheldon, IA 51201
Type: Post Secondary
Iowa Central Community College One Triton Circle
Fort Dodge, IA 50501
Type: Post Secondary
Northwestern College 101 Seventh St Sw
Orange City, IA 51041
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 October 1, 2025.

  1. U.S. Postal Service [Last Updated: 10/1/2025], https://www.usps.com
  2. ZIP-Codes.com Proprietary Data Enhancements [Updated: 10/1/2025], 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 2011-2023 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: 10/1/2025], https://nces.ed.gov