ZIP code · Henderson · Illinois · United States

ZIP code 61439 — Henderson

ZIP code 61439 serves Henderson, Illinois.

Postal code
61439
Single source Value from one source, not cross-checked.
City
Henderson
County
Knox FIPS 17095
State
Illinois
Country
United States
Coordinates
41.0276, -90.3575 — precision precise (locality)
View on OpenStreetMap
Population
268 (ZCTA, ACS 5-year)
Population density
214 / sq mi
Land area
1.3 sq mi (3.2 km²) (ZCTA, ACS 5-year)
Median household income
$56,429
Per-capita income
$25,227
Median age
32.5
Households
108
Housing units
123
Median home value
$97,500
Median gross rent
$625 / month
Congressional district
IL-17 (119th Congress)
USDA hardiness zone
5b (-15 to -10 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
309 (from the nearest rate centre)
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 84°F), coldest Jan (avg low 14°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F303548617281848276634835
Avg low °F141728405262656355433020
Precip in1.71.92.43.85.34.64.03.93.92.82.62.1

NOAA 1991–2020 climate normals from the nearest station: GALESBURG (5.8 mi) · NOAA NCEI

Places in ZIP 61439

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page