Illinois Gazetteer > Illinois ZIP Codes > County ZIP Codes > De Kalb ZIP Codes

Also see: ZIP Codes in De Kalb with Associated Cities & Towns

ZIP Codes in De Kalb County with Associated Cities & Towns

Clare   60111
Cortland   60112
Dekalb   60115
Esmond   60129
Genoa   60135
 Hinckley   60520
Kingston   60145
Kirkland   60146
Malta   60150
Sandwich   60548
 Shabbona   60550
Somonauk   60552
Sycamore   60178
Waterman   60556

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.