Residential delivery area · Illinois
ZIP Code 61259: Illinois City, IL
ZIP code 61259 uses the postal name Illinois City, Illinois and lies mostly in Rock Island County (97% of its land) with the rest in Mercer County (Census 2020 ZIP-county file). About 1,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $91,458 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Illinois City (a census-designated place); more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- Illinois City · its only residential ZIP
- County
- Rock Island County (97%); Mercer County (3%)
- Census places
- Illinois City census-designated place
- Metro area
- Davenport-Moline-Rock Island, IA-IL
- House districts
- IL-17 (97%), IL-15 (3%) 119th Congress, by share of land
- State
- Illinois
- Time zone
- Central
- Land area
- 76.8 sq mi · 14 people per sq mi
Where is ZIP code 61259?
61259 centers on 41.386°, -90.924° and covers 76.8 square miles of land plus 8.4 of water. It borders 7 ZIP codes: 61237, 52761, 61284, 61272, 61260, 52728, 61264.
The map draws ZIP code areas only. For the streets inside 61259, 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 61259 compare with the rest of Rock Island County?
| Measure | 61259 | In Rock Island County | In IL |
|---|---|---|---|
| People (ACS 2020-2024) | 1,053 | 16th of 21 | 900th of 1,396 |
| Median household income | $92k | not ranked | not ranked |
| Median home value | $201k | 6th of 17 | 386th of 842 |
61259's median household income is not ranked: its 90% margin of error (±$36,549) is more than a quarter of the figure ($91,458). 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 21% 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 61259?
The 2020 Census counted 1,197 people in 61259; the ACS, which samples households over 2020-2024, estimates 1,053. Between the 2010 and 2020 censuses its population fell 6.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,053±310 (90% margin)
- 2020 Census count
- 1,197−6.2% since 2010 (1,276)
- Households
- 480
- Median age
- 55.3
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 61259?
Of the 1,053 people the ACS estimates in 61259, 13.9% are under 18 and 21.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (98.5%).
- Under 1813.9%
- 18 to 6464.5%
- 65 and older21.7%
- White, not Hispanic98.5%
- Asian, not Hispanic1.5%
- Hispanic or Latino0.0%
- Black, not Hispanic0.0%
- Other or two or more0.0%
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 61259 earn?
Median household income is $91,458 (ACS 2020-2024). It is not measurably different from 2015-2019 ($98,830 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $91,458±$36,549
- Income per person
- $45,792
- Below the poverty line
- 4.3%
- Unemployed (of the labor force)
- 1.3%
- Adults 25+ with a bachelor's degree
- 22.7%
- Adjusted gross income per tax return, 2022
- $83,437570 returns; wages 66% 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 61259?
- Median home value (owners' estimate)
- $201,100
- Median gross rent
- –
- Homes owned by their occupants
- 91.5%
- Housing units
- 534
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 61259?
9 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction3
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 61259?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 61237 | Buffalo Prairie | 0 | – | 4.4 mi |
| 52761 | Muscatine, IA | 29,474 | $62k | 8.2 mi |
| 61284 | Taylor Ridge | 2,599 | $101k | 9.1 mi |
| 61272 | New Boston | 1,437 | $64k | 10.3 mi |
| 61260 | Joy | 737 | $42k | 10.4 mi |
| 52728 | Buffalo, IA | 984 | $69k | 11.4 mi |
| 61264 | Milan | 10,073 | $78k | 17.1 mi |
| 52759 | Montpelier, IA | 167 | $71k | 7.9 mi (near) |
| 52726 | Blue Grass, IA | 5,160 | $104k | 10.7 mi (near) |
| 61232 | Andalusia | 1,469 | $74k | 10.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.