Find the last 4 digits (ZIP+4) for an address in 61101

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ZIP Code 61101 – Rockford, IL

Rockford, Illinois · Winnebago County · Central time

ZIP code61101
CityRockford
StateIllinois
CountyWinnebago County
Population19,318
Time zoneCentral · local time
ZIP typeStandard (has a Census ZCTA area)
Land area41.52 sq mi
Center (lat, long)42.3461, -89.1461

Area codes in this area

779815

These are the area codes that most often serve ZIP 61101 (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

61106 Rockford · 1.9 mi61110 Rockford · 1.9 mi61125 Rockford · 1.9 mi61126 Rockford · 1.9 mi61130 Loves Park · 1.9 mi61131 Loves Park · 1.9 mi61132 Loves Park · 1.9 mi61103 Rockford · 3 mi

About ZIP 61101

ZIP code 61101 is assigned to Rockford, Illinois. It lies in Winnebago County. Its Census area covers about 41.52 square miles of land. The closest neighboring ZIP is 61106 (Rockford), about 1.9 miles away.

Every address in 61101 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