ZIP code · Rockford · Illinois · United States

ZIP code 61108 — Rockford

ZIP code 61108 serves Rockford, Illinois.

Postal code
61108
Single source Value from one source, not cross-checked.
City
Rockford
County
Winnebago FIPS 17201
State
Illinois
Country
United States
Coordinates
42.2514, -89.0235 — precision precise (locality)
View on OpenStreetMap
Population
30,202 (ZCTA, ACS 5-year)
Population density
2,767 / sq mi
Land area
10.9 sq mi (28.3 km²) (ZCTA, ACS 5-year)
Median household income
$63,046
Per-capita income
$30,023
Median age
39.7
Households
11,855
Housing units
12,650
Median home value
$128,300
Median gross rent
$986 / month
Congressional districts
IL-17 (also IL-16) (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 codes
815, 779
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 15°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F293347607181848275624734
Avg low °F151828395060646254423120
Precip in1.61.62.43.84.25.23.84.23.62.62.31.9

NOAA 1991–2020 climate normals from the nearest station: ROCKFORD GTR ROCKFORD AP (5.4 mi) · NOAA NCEI

Places in ZIP 61108

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