US Gazetteer > Idaho Gazetteer > Idaho ZIP Codes > Irwin, ID 83428

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Preferred Name, USPS
Irwin, ID 83428
Acceptable Alternative
Palisades, ID 83428

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The 83428 ZIP Code is centered1 in Bonneville County at latitude 43.411 and longitude -111.291 (Panoramio Photos). It is a standard type ZIP Code. Bonneville County is in the Mountain Time Zone (UTC -7 hours) and observes daylight savings time.

The population in ZIP Code Tabulation Area (ZCTA) 83428 was 242 with 222 housing units; a land area land area of 92.07 sq. miles; a water area of 0.49 sq. miles; and a population density of 2.63 people per sq. mile for Census 2000. Demographic Profile

Irwin, ID 83428 Map (Marker is ZIP Code Centroid)

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Nearby Cities, Towns & Census Designated Places

Irwin, ID (< 0.1 mile)
Swan Valley, ID (4.1 miles NW)
Palisades, ID (5.5 miles SE)

Nearby Neighborhoods, Subdivisions & Other Small Populated Places

No additional populated places within a 20 miles radius found.

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.