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zipcodes.pro — CITY/IL/DEKALB

Dekalb ZIP code, Illinois

The ZIP code for Dekalb, IL is 60115, and its area codes are 815 and 779.

USPS city name
1 ZIP code
Overlapping the city
2 more
Population
40,443
Area codes
815, 779

Mail addressed to Dekalb uses the ZIP code above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Dekalb in numbers

About 40,443 people live in Dekalb, in 16,388 households, the 41st-largest of Illinois's 1,443 census places. The median household income is $46,481 a year, 44% below the Illinois median of $83,390 (US: $80,734). The median owner-occupied home is valued at $204,700 (22% below the Illinois median), and median gross rent is $1,029 a month. The median age is 26.1; 33.7% of adults 25 and over hold a bachelor's degree or higher (37.8% across Illinois); the average commute takes 24 minutes.

Population40,443Dekalb40,443
Households16,388Dekalb16,388
Median age26.1Dekalb26.1Illinois39.0US 38.9
Median household income$46,481Dekalb$46,481Illinois$83,390US $80,734
Median home value$204,700Dekalb$204,700Illinois$263,300US $332,700
Median gross rent$1,029Dekalb$1,029Illinois$1,274US $1,413
Bachelor's degree or higher33.7%Dekalb33.7%Illinois37.8%US 35.7%
Mean commute23.8 minDekalb23.8 minIllinois27.8 minUS 26.4 min
Population density2,309 / sq miDekalb2,309 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place DeKalb city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Dekalb

ZIP codes with the USPS city name Dekalb
ZIP City Type Population Median income Median home
60115 Dekalb , IL Standard 42,536 $47,043 $208,600

Other ZIP codes overlapping Dekalb

These ZIP codes cover part of Dekalb but are addressed as somewhere else.

ZIP codes overlapping Dekalb
ZIP City Type Population Median income Median home
60112 Cortland , IL Standard 4,621 $72,831 $229,900
60178 Sycamore , IL Standard 22,224 $92,913 $279,500

Map of Dekalb ZIP codes

60115

The ZIP codes of Dekalb, IL, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Dekalb

The nearest larger towns are Elgin (114,934 people, 23 mi), Aurora (179,898 people, 26 mi) and Rockford (147,521 people, 28 mi).

Towns near Dekalb
TownPopulationDistance
Cortland 4,564 3.1 mi
Sycamore 18,559 5.9 mi
Genoa 5,492 11.6 mi
Elburn 6,354 15.0 mi
Rochelle 9,529 16.3 mi
Campton Hills 10,877 17.1 mi
Hampshire 8,524 18.0 mi
Sugar Grove 9,240 18.9 mi
Pingree Grove 10,914 19.5 mi
Plano 12,203 20.3 mi
Sandwich 7,219 20.3 mi
Lake Holiday 5,641 21.7 mi
Geneva 21,258 21.7 mi
Davis Junction 2,757 21.8 mi

More nearby: every ZIP code in DeKalb County · Illinois ZIP codes

Cite this page

zipcodes.pro. “Dekalb, IL ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/il/dekalb

Underlying data is public domain or openly licensed — sources, vintages and licences.