ZIP Code 54645 in Mount Sterling, WI

Data Last Updated: February 1, 2026
City:Mount Sterling, Wisconsin
City Alias:Mt Sterling
County:Crawford County
Timezone:Central (GMT -06:00)
Local Time:7:31:59 AM
Population:120 [See All]
Area Codes:353 / 608
Classification:PO Box
Coordinates:43.3146, -90.9291
Land Area:0.694 sq mi
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54645 - Mount Sterling, WI

ZIP Code 54645, Mount Sterling

Small Town Unique ZIP
LocationCrawford County, WI
Area0 sq mi Single Point
Population120
Households56
PO Boxes28 (50% adoption)
Median Age44.5 years
ZIP CreatedBefore Oct 2004
Enclosed InZIP Code 54631
Key Facts
  • This is a PO Box-only ZIP code, meaning the ZIP itself contains only PO Boxes, though nearby areas may receive street delivery from neighboring ZIP codes.
  • The post office maintains 28 PO Boxes serving a community of 56 occupied households, giving an adoption rate of 0.50.
  • Mount Sterling has a population of 120 people across 62 total housing units, with 56 occupied and 6 vacant.
  • The community has two rural carrier routes that serve the surrounding area outside the post office itself.
  • Only two streets appear in the ZIP+4 database: West Street and Diagonal Street, reflecting the community's small size.
  • The median household income is $48,472, with median home values at $130,000.

Community Overview

Mount Sterling sits in Crawford County, Wisconsin, with a population of 120 people spread across 56 occupied households. The community doesn't have street delivery within its ZIP boundaries, though nearby ZIP 54631 provides that service to the broader area. The post office maintains 28 PO Boxes, which translates to an adoption rate of 0.50—exactly half of local households use boxes for their mail.

Postal Services and Geography

The median age here is 44.5 years, and the median household income stands at $48,472. Most residents live in single-family homes, with a median property value of $130,000. Two main streets handle the limited carrier delivery: West Street and Diagonal Street. The rural character is evident in the two rural carrier routes that serve the surrounding area, while the post office itself anchors mail service for this small Wisconsin community.

Street Name Patterns

Rural Community Minimal Street Infrastructure

The two streets in Mount Sterling's ZIP+4 database reflect a minimal street infrastructure typical of very small rural Wisconsin communities. West Street and Diagonal Street each appear once, indicating limited delivery points outside the PO Box system.

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Population & Demographics


ZIP Code 54645 has 120 residents and 56 households (average 2.14 persons per household). The median age is 44.5 years, older than the state (40.1) and older than the nation (38.8). The gender split is 58.3% male and 41.7% female, which is much higher than the national male share (49.1%), making this a male-majority area. Largest groups are White (97.5%, much higher than the state average of 80.4% and well above the national average of 61.6%) and Other / Two or More Races (0.8%, much lower than the national average of 8.4%); Hispanic or Latino residents make up 0.0%, 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 2011-2024 American Community Survey (ACS) 5-Year Estimates.
2020 Population:120Source: Census DHC
2024 ACS Population Estimate:97Source: Census ACS
2026 ZC Population Estimate:0Source: ZIP-Codes.com
Population Density:172.9 people per sq mile
Average Income:$50,833Source: Census ACS
Households:56Source: Census DHC
Average House Value:$137,500Source: Census ACS
Persons Per Household:2.14Source: Census DHC
Average Family Size:2.38Source: Census ACS

Population Over Time (with 2010 & 2020 Census Benchmarks)


Group201020112102201320142015201620172018201920202021202220232024
Census ACS Population Estimate--727271705866566180566911711497
Decennial Census81------------------120--------
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: 44.5

Male Median Age: 46

Female Median Age: 43.3

Group< 55-910-1415-1920-2425-2930-3435-3940-4445-4950-5455-5960-6465-6970-7475-7980-8485+
Male325522491571555351
Female6320112310041155222
Total95753361211511261010573
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Population by Race


White:11799.15%
Black:00%
Hispanic:*00%
Asian:00%
American Indian:00%
Hawaiian:00%
Other:10.85%
Total:118100%
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:7058.33%46.0 years
Females:5041.67%43.3 years
Total:120100%44.5 years
Source: U.S. Census Bureau (2020) Demographics & Housing Characteristics (DHC)

Nativity & Citizenship


Native, born in the United States:9294.85%
Native, born in PR, Island Areas, or abroad:00.00%
Foreign born, naturalized U.S. citizen:55.15%
Foreign born, not a U.S. citizen:05.15%
Total Population:97100%
Total Native Population:9294.85%
Total Foreign-born Population:55.15%
Source: U.S. Census 2020-2024 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 2024, the Median household income is $50,833, which is well under the national median ($80,734), is down $4,250 (7.7%) since 2011 and above its 2019 pre-pandemic level by $25,833. Family households earn a median of $53,750 versus $20,000 for nonfamily households (a difference of $33,750). By gender, male median income is $56,389 and female is $34,375, which is much lower than the national female median ($55,274), with a current gap of $22,014 that has widened from 2011 to 2024. The labor-force participation rate is 36.1%, which is far less than the national rate (63.5%). The unemployment rate is 0.0%, which is considerably lower than the national rate (5.2%). The largest occupation group is Sales (23.1%).

Explore More:Income Over TimeHousehold IncomeEmployment StatusBy Occupation

Source: U.S. Census 2011-2024 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 Type20112012201320142015201620172018201920202021202220232024
Median Household Income$55,083$56,042$57,614$57,841$29,375$0$30,250$30,833$25,000$0$29,107$45,556$48,472$50,833
Median Family Income$46,250$47,500$49,643$49,821$40,000$0$0$0$33,333$0$44,318$51,563$49,886$53,750
Median NonFamily Income$50,625$31,875$53,438$31,250$23,750$0$0$0$20,000$0$14,375$13,750$12,045$20,000
Median Male Income$32,639$35,625$35,750$35,625$37,250$0$0$0$0$0$47,813$52,188$53,750$56,389
Median Female Income$35,536$37,679$37,708$37,679$0$0$0$0$0$0$0$38,750$34,375$34,375
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Average Household Income


Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Employment Status


Employed:2636.11%
Unemployed:00.00%
Not In Labor Force:4663.89%
Total:72100%
Source: U.S. Census 2020-2024 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:415.38%
Service:415.38%
Sales and Office:623.08%
Natural resources, construction, and maintenance:623.08%
Production, transportation, and material moving:623.08%
Total Civilian Employed Population:26100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS.

Housing & Affordability


In 2024, the median home value is $137,500, which is considerably lower than the national median ($332,700), is up $45,000 (48.65%) since 2011 and above its 2019 pre-pandemic level by $67,500. The median gross rent is $675, which is far less than the national median ($1,413), is up $175 (35.00%) since 2011 and above its 2019 pre-pandemic level by $108. Insufficient data for owner/renter mix. Insufficient data for vacancy rate.

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 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Home Value Over Time


Group20112102201320142015201620172018201920202021202220232024
Median Home Value$92,500$60,000$65,000$65,000$51,300$68,300$70,000$75,000$70,000$68,800$117,500$112,500$130,000$137,500
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Gross Rent Paid


Less than $500:533.33%
$500 to $999:1066.67%
$1,000 to $1,499:00.00%
$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:00.00%
Total:15100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Median Gross Rent Over Time


Group20112102201320142015201620172018201920202021202220232024
Median Rent$500$0$0$0$0$807$808$483$567$575$573$625$683$675
Source: U.S. Census 2011-2024 American Community Survey 5-Year Estimates. DP04. SELECTED HOUSING CHARACTERISTICS

Housing Occupancy


Owner Occupied (with mortgage):2045.45%
Owner Occupied (free and clear, no mortgage):920.45%
Renter Occupied:1534.09%
Total Occupied Housing Units:44100%

Occupied Housing Units:4481.48%
Vacant Housing Units (not graphed):1018.52%
Total Housing Units:54100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

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


Single-Family Units:4379.63%
Multi-Family Units:59.26%
Other Units:611.11%
Total Housing Units:54100%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP04. SELECTED HOUSING CHARACTERISTICS

Education, Health & Community


In 2024, 8.80% of adults (25+) have a bachelor's degree or higher, which is far lower than the national rate (35.70%). High school or higher is 98.50%, which is far higher than the national rate (89.60%). The uninsured rate is 6.20%, which is comparable to the national rate (8.40%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.80%), down 8.70 percentage points since 2011 and below its 2019 pre-pandemic level by 25.00 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 (57.89%). College enrollment is 0.00%, which is comparable to the national rate (26.70%), meaning the community mirrors broader higher-education participation.

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:00.00%
9th to 12th grade, no diploma:11.47%
High school graduate (includes equivalency):4160.29%
Some college, no degree:1116.18%
Associate's degree:913.24%
Bachelor's degree:34.41%
Graduate or professional degree:34.41%
Total:68100%
High school or higher:6798.53%
Bachelor's degree or higher:68.82%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

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


Private Insurance:7159.17%
Public Insurance:4335.83%
No Insurance:65.00%
Total:120100%
Has Health Insurance:11495.00%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

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


Group20112102201320142015201620172018201920202021202220232024
% of People in Poverty8.7%8.3%9.1%8.7%13.6%22.7%30.8%29.4%25.0%25.0%0.0%0.0%0.0%0.0%
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:421.05%
Kindergarten:00.00%
Elementary school (grades 1-8):1157.89%
High school (grades 9-12):421.05%
College or graduate school:00.00%
Total:19100%
Early Childhood:421.05%
K-12 (Primary & Secondary School):1578.95%
Source: U.S. Census 2020-2024 American Community Survey 5-Year Estimates. Table DP02. SELECTED SOCIAL CHARACTERISTICS

Business & Employment Statistics


ZIP Code 54645 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 13 people with an annual payroll of $150,000.

# Residential Mailboxes:0Source: USPS
# Business Mailboxes:0Source: USPS
Total Delivery Receptacles:30Source: USPS
Single Family Delivery Units:0Source: USPS
Multi Family Delivery Units:0Source: USPS
# of Businesses:3Source: CBP
1st Quarter Payroll:$34,000Source: CBP
Annual Payroll:$150,000Source: CBP
# of Employees:13Source: CBP

Geography, Land Area, & Statistical Classifications


ZIP Code 54645 is located in Crawford County, Wisconsin, within the Metropolitan Statistical Area (CBSA ) and Wisconsin's 3rd Congressional District. This area has a population of 0 people, about 0.00% of whom live in ZIP Code 54645. It covers 0.694 sq mi of land and a water area of 0 sq mi.

CBSA Name:--Source: Census
CBSA Number:--Source: Census
CBSA Type:--Source: Census
CBSA Division:--Source: Census
CBSA Population:0Source: Census
MSA:Source: Census
Land Area:0.694 sq miSource: Census
Water Area:--Source: Census
Congressional District:03Source: USPS
Congressional Land Area:11111.79 sq miSource: Census
PMSA:Source: Census
Intro Date:< 2004-10Source: ZIP-Codes.com
Place FIPS Code:5554900Source: Census
Place Name:Mount Sterling village; WisconsinSource: Census

Adjacent & Nearby ZIP Codes


54646 | | 54644

Schools in ZIP Code 54645


We could not locate which school district 54645 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.

Seneca Elementary 202 Main St
Seneca, WI 54654
District: Seneca School DistrictNearby
Seneca High 202 Main St
Seneca, WI 54654
District: Seneca School DistrictNearby
Seneca Junior High 202 Main St
Seneca, WI 54654
District: Seneca School DistrictNearby
North Crawford High 47050 County Road X
Soldiers Grove, WI 54655
District: North Crawford School DistrictNearby
North Crawford Elementary 47050 County Road X
Soldiers Grove, WI 54655
District: North Crawford School DistrictNearby
Youth Initiative High School 118 W S St
Viroqua, WI 54665
District: Private SchoolNearby
Pleasant Ridge Waldorf School 431 E Ct St
Viroqua, WI 54665
District: Private SchoolNearby
Cornerstone Christian Academy S3655 Duncan Ln
Viroqua, WI 54665
District: Private SchoolNearby

Colleges & Post Secondary Schools near ZIP Code 54645


Southwest Wisconsin Technical College 1800 Bronson Blvd
Fennimore, WI 53809-9778
Type: Post Secondary
Viterbo University 900 Viterbo Drive
La Crosse, WI 54601-8804
Type: Post Secondary
University Of Wisconsin-La Crosse 1725 State St
La Crosse, WI 54601-9959
Type: Post Secondary
Western Technical College 400 Seventh St. North
La Crosse, WI 54601
Type: Post Secondary
The Salon Professional Academy-Onalaska 566 Theater Rd
Onalaska, WI 54650
Type: Post Secondary
Luther College 700 College Drive
Decorah, IA 52101-1045
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