| City: | Andover, Illinois |
| County: | Henry County |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 8:09:56 AM |
| Population: | 391 [See All] |
| Area Codes: | 309 / 861 |
| Classification: | PO Box |
| Coordinates: | 41.2940, -90.2906 |
| Land Area: | 0.719 sq mi |
| Quick Link: |
Andover is a small rural community in Henry County, Illinois, with 391 residents across 162 households. This is a PO Box Only Zone. There's no carrier delivery to homes, making the post office the only way to receive mail across the 0.96 square mile town and surrounding area.
The Andover post office maintains 234 PO Boxes for 162 local households, a 1.44x adoption rate that signals service beyond town limits. Rural residents from the surrounding countryside also rely on this facility, typical for small Illinois towns that serve as regional mail access points.
Mail reaches residents through two rural carrier routes covering 75 delivery points. Street addresses exist on a classic small-town grid (numbered 1st through 8th Streets intersecting with tree-named streets like Oak, Cedar, Mulberry, and Locust), but mail doesn't arrive at those addresses. Instead, it goes to PO Boxes or general delivery at the post office.
The community has an established character. With 107 of 171 homes built before 1939, Andover retains its historic small-town structure. Median age is 41.5 years, and 87% of households own their homes (141 of 162). It's not a wealthy community but solidly middle class, with median household income of $66,146 and median home values around $172,500.
Andover's economy shows some unusual patterns for a town this size. About 29% of workers work from home, well above typical rural rates. Transportation and warehousing employ a significant portion of the workforce, suggesting proximity to distribution corridors or grain logistics. With just 11 business establishments and 35 employees, most residents commute elsewhere for work.
All mail must be addressed to a PO Box:
[Recipient Name]
PO Box [Number]
Andover, IL 61233General delivery is available for those without a box. Street addresses won't work for mail, even though they're used for other purposes.
Classic small-town grid with numbered streets (1st-8th) intersecting tree-named streets (Oak, Elm, Cedar, Mulberry, Locust, Beech, Ash, Pine, Aspen).
ZIP Code 61233 has 391 residents and 162 households (average 2.41 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 52.9% male and 47.1% female, which is higher than the state male share (49.0%), making this a male-majority area. Largest groups are White (96.2%, much higher than the state average of 61.4% and well above the national average of 61.6%) and Hispanic or Latino (1.5%); Hispanic or Latino residents make up 1.5%, which is much lower than the national average (18.7%).
Explore More:Population Over TimeBy Age & GenderBy RaceBy GenderNativity & Citizenship
| 2020 Population: | 391Source: Census DHC |
| 2024 ACS Population Estimate: | 281Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 543.8 people per sq mile |
| Average Income: | $71,667Source: Census ACS |
| Households: | 162Source: Census DHC |
| Average House Value: | $182,600Source: Census ACS |
| Persons Per Household: | 2.41Source: Census DHC |
| Average Family Size: | 2.93Source: 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 | 244 | 253 | 245 | 281 |
| Decennial Census | 0 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 391 | -- | -- | -- | -- |
Median Age: 41.5
Male Median Age: 41.9
Female Median Age: 39.5
| 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 | 15 | 12 | 18 | 11 | 13 | 9 | 7 | 13 | 21 | 13 | 10 | 10 | 19 | 9 | 15 | 6 | 4 | 2 |
| Female | 7 | 12 | 11 | 19 | 12 | 12 | 10 | 9 | 8 | 9 | 3 | 14 | 13 | 12 | 13 | 12 | 5 | 3 |
| Total | 22 | 24 | 29 | 30 | 25 | 21 | 17 | 22 | 29 | 22 | 13 | 24 | 32 | 21 | 28 | 18 | 9 | 5 |
| White: | 376 | 97.41% |
| Black: | 0 | 0% |
| Hispanic:* | 6 | 1.55% |
| Asian: | 0 | 0% |
| American Indian: | 1 | 0.26% |
| Hawaiian: | 0 | 0% |
| Other: | 3 | 0.78% |
| Total: | 386 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 207 | 52.94% | 41.9 years |
| Females: | 184 | 47.06% | 39.5 years |
| Total: | 391 | 100% | 41.5 years |
| Native, born in the United States: | 276 | 98.22% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 3 | 1.07% |
| Foreign born, not a U.S. citizen: | 2 | 1.78% |
| Total Population: | 281 | 100% |
| Total Native Population: | 276 | 98.22% |
| Total Foreign-born Population: | 5 | 1.78% |
In 2024, the Median household income is $71,667, which is far less than the national median ($80,734), and above its 2019 pre-pandemic level by $71,667. Family households earn a median of $103,750 versus $24,000 for nonfamily households (a difference of $79,750). By gender, male median income is $71,250 and female is $81,719, which is markedly greater than the national female median ($55,274), with a current gap of $10,469 that has narrowed from 2011 to 2024. The labor-force participation rate is 68.4%, which is well above the national rate (63.5%). The unemployment rate is 5.1%, which is comparable to the national rate (5.2%). The largest occupation group is Management (40.0%).
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 | $57,614 | $57,500 | $66,146 | $71,667 |
| Median Family Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $59,773 | $65,714 | $67,375 | $103,750 |
| Median NonFamily Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $24,000 |
| Median Male Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $59,531 | $66,250 | $72,500 | $71,250 |
| Median Female Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $40,417 | $55,417 | $0 | $81,719 |
| Employed: | 150 | 64.94% |
| Unemployed: | 8 | 3.46% |
| Not In Labor Force: | 73 | 31.60% |
| Total: | 231 | 100% |
| Management, business, science, and arts: | 60 | 40.00% |
| Service: | 22 | 14.67% |
| Sales and Office: | 22 | 14.67% |
| Natural resources, construction, and maintenance: | 11 | 7.33% |
| Production, transportation, and material moving: | 35 | 23.33% |
| Total Civilian Employed Population: | 150 | 100% |
In 2024, the median home value is $182,600, which is much lower than the national median ($332,700), and above its 2019 pre-pandemic level by $182,600. The median gross rent is $750, which is well under the national median ($1,413), and above its 2019 pre-pandemic level by $750. Of occupied housing, owners make up 77.59% (75.56% with a mortgage, 24.44% free-and-clear) and renters 22.41% - making this ZIP Code under national rental averages. The vacancy rate is 0.00%, which is considerably lower than the national rate (10.12%).
Explore More:Compare Home ValueHome Value Over TimeRent & Over TimeHousing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $108,700 | $135,500 | $172,500 | $182,600 |
| Less than $500: | 2 | 7.69% |
| $500 to $999: | 21 | 80.77% |
| $1,000 to $1,499: | 3 | 11.54% |
| $1,500 to $1,999: | 0 | 0.00% |
| $2,000 to $2,499: | 0 | 0.00% |
| $2,500 to $2,999: | 0 | 0.00% |
| $3,000 or more: | 0 | 0.00% |
| No Rent: | 0 | 0.00% |
| Total: | 26 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $750 | $786 | $843 | $750 |
| Owner Occupied (with mortgage): | 68 | 58.62% |
| Owner Occupied (free and clear, no mortgage): | 22 | 18.97% |
| Renter Occupied: | 26 | 22.41% |
| Total Occupied Housing Units: | 116 | 100% |
| Occupied Housing Units: | 116 | 100.00% |
| Vacant Housing Units (not graphed): | 0 | 0.00% |
| Total Housing Units: | 116 | 100% |
| Single-Family Units: | 110 | 94.83% |
| Multi-Family Units: | 6 | 5.17% |
| Other Units: | 0 | 0.00% |
| Total Housing Units: | 116 | 100% |
In 2024, 23.20% 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 90.00%, which is comparable to the national rate (89.60%). The uninsured rate is 4.30%, which is comparable to the national rate (8.40%). Private coverage is 84.00%, which is well above the national rate (67.10%). Public coverage is 24.90%, which is falls below the national rate (36.70%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.80%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Among residents ages 3+, the largest enrollment group is high school (45.16%). College enrollment is 9.68%, 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
| Less than 9th grade: | 4 | 1.90% |
| 9th to 12th grade, no diploma: | 17 | 8.06% |
| High school graduate (includes equivalency): | 73 | 34.60% |
| Some college, no degree: | 41 | 19.43% |
| Associate's degree: | 27 | 12.80% |
| Bachelor's degree: | 41 | 19.43% |
| Graduate or professional degree: | 8 | 3.79% |
| Total: | 211 | 100% |
| High school or higher: | 190 | 90.05% |
| Bachelor's degree or higher: | 49 | 23.22% |
| Private Insurance: | 236 | 74.21% |
| Public Insurance: | 70 | 22.01% |
| No Insurance: | 12 | 3.77% |
| Total: | 318 | 100% |
| Has Health Insurance: | 306 | 96.23% |
| 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: | 4 | 6.45% |
| Kindergarten: | 2 | 3.23% |
| Elementary school (grades 1-8): | 22 | 35.48% |
| High school (grades 9-12): | 28 | 45.16% |
| College or graduate school: | 6 | 9.68% |
| Total: | 62 | 100% |
| Early Childhood: | 6 | 9.68% |
| K-12 (Primary & Secondary School): | 52 | 83.87% |
ZIP Code 61233 supports both business and residential activity. According to the Business Census (2024), there are 11 business establishments, employing about 45 people with an annual payroll of $1,412,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 305Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 11Source: CBP |
| 1st Quarter Payroll: | $328,000Source: CBP |
| Annual Payroll: | $1,412,000Source: CBP |
| # of Employees: | 45Source: CBP |
ZIP Code 61233 is located in Henry County, Illinois, within the Davenport-Moline-Rock Island, IA-IL Metropolitan Statistical Area (CBSA 19340) and Illinois's 16th Congressional District. This Metro area has a population of 379,690 people, about 0.10% of whom live in ZIP Code 61233. It covers 0.719 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Davenport-Moline-Rock Island, IA-ILSource: Census |
| CBSA Number: | 19340Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 379,690Source: Census |
| MSA: | Davenport-Moline-Rock Island, IA-IL MSASource: Census |
| Land Area: | 0.719 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: | 1701491Source: Census |
| Place Name: | Andover village; IllinoisSource: Census |
We could not locate which school district 61233 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.