Residential delivery area · Illinois
ZIP Code 61261: Lyndon, IL
ZIP code 61261 uses the postal name Lyndon, Illinois and lies entirely in Whiteside County (Census 2020 ZIP-county file). About 660 people live there (Census Bureau, ACS 2020-2024). Median household income is $64,375 (Census Bureau, ACS 2020-2024). By Census place, 5% of its land lies in Lyndon; 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2021
- ZBP2023
- IRS2022
- Town
- Lyndon · its only residential ZIP
- County
- Whiteside County
- Census places
- Lyndon
- Micro area
- Sterling, IL
- House district
- IL-17 119th Congress
- State
- Illinois
- Time zone
- Central
- Land area
- 16.6 sq mi · 40 people per sq mi
Where is ZIP code 61261?
61261 centers on 41.736°, -89.910° and covers 16.6 square miles of land plus 0.3 of water. It borders 4 ZIP codes: 61270, 61277, 61081, 61250.
The map draws ZIP code areas only. For the streets inside 61261, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 61261 compare with the rest of Whiteside County?
| Measure | 61261 | In Whiteside County | In IL |
|---|---|---|---|
| People (ACS 2020-2024) | 656 | 10th of 13 | 1,039th of 1,396 |
| Median household income | $64k | not ranked | not ranked |
| Median home value | $134k | not ranked | not ranked |
61261's income and home value are not ranked: it has fewer than 1,000 residents (656). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 38% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 61261?
The 2020 Census counted 847 people in 61261; the ACS, which samples households over 2020-2024, estimates 656. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 656±156 (90% margin)
- 2020 Census count
- 847
- Households
- 327
- Median age
- 60.0
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 61261?
Of the 656 people the ACS estimates in 61261, 14.5% are under 18 and 30.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.5%), then Hispanic or Latino (13.0%).
- Under 1814.5%
- 18 to 6455.5%
- 65 and older30.0%
- White, not Hispanic84.5%
- Hispanic or Latino13.0%
- Other or two or more1.8%
- Black, not Hispanic0.6%
- Asian, not Hispanic0.2%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 61261 earn?
Median household income is $64,375 (ACS 2020-2024).
- Median household income
- $64,375±$11,094
- Income per person
- $39,594
- Below the poverty line
- 2.9%
- Unemployed (of the labor force)
- 0.0%
- Adults 25+ with a bachelor's degree
- 22.9%
- Adjusted gross income per tax return, 2022
- $57,577430 returns; wages 65% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 61261?
- Median home value (owners' estimate)
- $134,100
- Median gross rent
- –
- Homes owned by their occupants
- 89.3%
- Housing units
- 417
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 61261?
14 business establishments had a location in this ZIP code in 2023, 4 fewer than in 2018; the most are in wholesale trade (ZIP Code Business Patterns).
- Wholesale trade4
- Transportation and warehousing3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 61261?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 61270 | Morrison | 6,912 | $81k | 6.8 mi |
| 61277 | Prophetstown | 3,054 | $70k | 8.5 mi |
| 61081 | Sterling | 20,844 | $68k | 11.8 mi |
| 61250 | Erie | 2,781 | $85k | 11.8 mi |
| 61251 | Fenton | 377 | $80k | 8.4 mi (near) |
| 61037 | Galt | 145 | $70k | 8.5 mi (near) |
| 61071 | Rock Falls | 13,581 | $61k | 10.9 mi (near) |
| 61283 | Tampico | 1,269 | $64k | 11.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.