Find the last 4 digits (ZIP+4) for an address in 61103

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ZIP Code 61103 – Rockford, IL

Rockford, Illinois · Winnebago County · Central time

ZIP code61103
CityRockford
StateIllinois
CountyWinnebago County
Population22,869
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area16.34 sq mi
Center (lat, long)42.3409, -89.0875

Area codes in this area

779815

These are the area codes that most often serve ZIP 61103 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

61101 Rockford · 3 mi61115 Machesney Park · 3.6 mi61111 Loves Park · 4.3 mi61106 Rockford · 4.4 mi61110 Rockford · 4.4 mi61125 Rockford · 4.4 mi61126 Rockford · 4.4 mi61130 Loves Park · 4.4 mi

About ZIP 61103

ZIP code 61103 is assigned to Rockford, Illinois. It lies in Winnebago County. Its Census area covers about 16.34 square miles of land. The closest neighboring ZIP is 61101 (Rockford), about 3 miles away.

Every address in 61103 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources