| City: | Lee Center, Illinois |
| County: | Lee County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:23:58 PM |
| Population: | 34 [See All] |
| Area Code: | 815 |
| Classification: | PO Box |
| Coordinates: | 41.7460, -89.2768 |
| Land Area: | 0.028 sq mi |
| Quick Link: |
Lee Center is a tiny rural community in Lee County, Illinois, serving just 34 residents across 23 households. The post office maintains 13 PO Boxes, and there's no alternative. This is a PO Box Only Zone, meaning residents can't receive mail by street delivery anywhere in the area.
Despite the PO Box classification, mail does reach some homes via rural carrier routes. Two rural routes serve the community, with Inlet Road being the only named street in the postal database. This pattern is typical of small crossroads communities where a handful of homes cluster near the post office but most delivery happens along rural routes.
All 23 housing units are owner-occupied, and nobody lives here seasonally. It's a permanent residential community with a median age of 41.5 years. The area is so small it shows up as a point location on postal maps rather than having defined boundaries, falling within the larger territory of neighboring ZIP 61310.
Only one street in postal records: Inlet Road with 3 delivery points.
ZIP Code 61331 has 34 residents and 23 households (average 1.48 persons per household). The median age is 41.5 years, slightly older than the state (38.8) and slightly older than the nation (38.8). The gender split is 20.6% male and 79.4% female, which is much lower than the national male share (49.1%), making this a female-majority area. Largest groups are White (91.2%, much higher than the state average of 61.4% and well above the national average of 61.6%) and Hispanic or Latino (2.9%); Hispanic or Latino residents make up 2.9%, which is much lower than the national average (18.7%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 34Source: Census DHC |
| 2024 ACS Population Estimate: | 0Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 1,214.3 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 23Source: Census DHC |
| Average House Value: | $0Source: Census ACS |
| Persons Per Household: | 1.48Source: Census DHC |
| Average Family Size: | 1.65Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 0 | 0 | 0 | 0 | 22 | 23 | 21 | 18 | 18 | 0 | 0 | 0 | 0 |
| Decennial Census | 55 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 34 | -- | -- | -- |
Median Age: 41.5
Male Median Age: 41.3
Female Median Age: 46.5
| 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 | 1 | 0 | 1 | 0 | 0 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Female | 2 | 0 | 2 | 1 | 2 | 1 | 3 | 2 | 0 | 1 | 3 | 0 | 6 | 3 | 1 | 0 | 0 | 0 |
| Total | 2 | 0 | 2 | 2 | 2 | 2 | 3 | 2 | 3 | 3 | 3 | 0 | 6 | 3 | 1 | 0 | 0 | 0 |
| White: | 31 | 91.18% |
| Black: | 0 | 0% |
| Hispanic:* | 1 | 2.94% |
| Asian: | 0 | 0% |
| American Indian: | 1 | 2.94% |
| Hawaiian: | 1 | 2.94% |
| Other: | 0 | 0% |
| Total: | 34 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 7 | 20.59% | 41.3 years |
| Females: | 27 | 79.41% | 46.5 years |
| Total: | 34 | 100% | 41.5 years |
| Native, born in the United States: | 0 | 0% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0% |
| Foreign born, naturalized U.S. citizen: | 0 | 0% |
| Foreign born, not a U.S. citizen: | 0 | 0% |
| Total Population: | 0 | 100% |
| Total Native Population: | 0 | 0% |
| Total Foreign-born Population: | 0 | 0% |
Insufficient data for educational attainment. Insufficient data for health insurance coverage. Insufficient data for poverty. Insufficient data for school enrollment.
Explore More:Educational AttainmentHealth InsurancePoverty Over TimeSchool Enrollment
| Less than 9th grade: | 0 | 0% |
| 9th to 12th grade, no diploma: | 0 | 0% |
| High school graduate (includes equivalency): | 0 | 0% |
| Some college, no degree: | 0 | 0% |
| Associate's degree: | 0 | 0% |
| Bachelor's degree: | 0 | 0% |
| Graduate or professional degree: | 0 | 0% |
| Total: | 0 | 100% |
| High school or higher: | 0 | 0% |
| Bachelor's degree or higher: | 0 | 0% |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | 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 61331 is designated for PO Box delivery only; business establishment and employment data are not available.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 27Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 61331 is located in Lee County, Illinois, within the Dixon, IL Metropolitan Statistical Area (CBSA 19940) and Illinois's 16th Congressional District. This Micro area has a population of 34,058 people, about 0.10% of whom live in ZIP Code 61331. It covers 0.028 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Dixon, ILSource: Census |
| CBSA Number: | 19940Source: Census |
| CBSA Type: | MicroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 34,058Source: Census |
| MSA: | Source: Census |
| Land Area: | 0.028 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 16Source: USPS |
| Congressional Land Area: | 7917.49 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 1742600Source: Census |
| Place Name: | Lee Center CDP; IllinoisSource: Census |
We could not locate which school district 61331 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.