US Gazetteer > Illinois Gazetteer > Illinois ZIP Codes > Rockford, IL 61104

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Rockford, IL 61104

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The 61104 ZIP Code is centered1 in Winnebago County at latitude 42.256 and longitude -89.081 (Panoramio Photos). It is a standard type ZIP Code. Winnebago County is in the Central Time Zone (UTC -6 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 61104 was 20,421 with 9,533 housing units; a land area land area of 4.48 sq. miles; a water area of 0 sq. miles; and a population density of 4,557.33 people per sq. mile for Census 2000. Demographic Profile

Rockford, IL 61104 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Rockford, IL (1.4 miles NNW)
Westmoreland, IL (4.3 miles WNW)
Loves Park, IL (4.5 miles NNE)
New Milford, IL (4.7 miles S)
Perryville, IL (5.6 miles ESE)
Morristown, IL (5.8 miles S)
Kishwaukee Glen, IL (5.8 miles SSE)
North Park, IL (6.3 miles NNE)
Machesney Park, IL (6.7 miles NNE)
Harlem, IL (6.7 miles NNE)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

River Forest, IL (1.4 miles SSW)
Kishwaukee Subdivision, IL (1.4 miles S)
Harrison Avenue Gardens, IL (1.4 miles SSE)
Gottfred Subdivision, IL (1.4 miles SSE)
Factory Addition, IL (1.4 miles SSE)
Grant Park, IL (1.9 miles SSW)
Green View Heights, IL (1.9 miles SSE)
Franklin Gardens, IL (1.9 miles S)
Kinseys Little Farms, IL (1.9 miles S)
Ravinia Park, IL (1.9 miles S)

ZIP Codes - Key Concepts

  1. ZIP Codes are categories for grouping mailing addresses and are not exact geographic regions.
  2. The centroid of a ZIP Code may be in one County and the associated city/town in another.
  3. In rural areas, a single ZIP Code may be used for cities and towns in several different Counties.
  4. ZIP Code "areas" can overlap, be subsets of each other, or be artificial constructs with no geographic area.
  5. ZIP Codes are only loosely tied to cities.

1 Keeping the above key concepts in mind, what we informally refer to as the "center" of a ZIP Code is most often actually the centroid of a polygon.