ZIP code · Saint Joseph · Illinois · United States

ZIP code 61873 — Saint Joseph

ZIP code 61873 serves Saint Joseph, Illinois.

Postal code
61873
Single source Value from one source, not cross-checked.
City
Saint Joseph
County
Champaign FIPS 17019
State
Illinois
Country
United States
Coordinates
40.1207, -88.0472 — precision precise (locality)
View on OpenStreetMap
Population
5,803 (ZCTA, ACS 5-year)
Population density
91 / sq mi
Land area
63.7 sq mi (165 km²) (ZCTA, ACS 5-year)
Median household income
$112,755
Per-capita income
$47,826
Median age
40
Households
2,209
Housing units
2,298
Median home value
$246,300
Median gross rent
$942 / month
Congressional district
IL-15 (119th Congress)
USDA hardiness zone
6a (-10 to -5 °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
217
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 18°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F343951647382848378665139
Avg low °F182230415262656356443224
Precip in2.42.22.83.95.05.04.43.53.43.33.12.4

NOAA 1991–2020 climate normals from the nearest station: OGDEN (4.8 mi) · NOAA NCEI

Places in ZIP 61873

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