Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/IN/COUNTY/DEKALB

DeKalb County, IN ZIP codes

There are 8 ZIP codes in DeKalb County, IN, in 8 towns, from 46705 to 46793. The largest are 46706 (Auburn), 46738 (Garrett) and 46721 (Butler).

The county seat is Auburn.

ZIP codes
8
Towns
8
County seat
Auburn
County FIPS
18033
State
Indiana
Population
43,807
Median household income
$74,331
Land area
363 sq mi
Area code
260
Metro area
Auburn

DeKalb County ZIP codes by town

Auburn (county seat)
46706

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of DeKalb County ZIP codes

4670546706467214673046738467854678846793

The ZIP codes of DeKalb County, 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.

DeKalb County in numbers

About 43,807 people live in DeKalb County, in 17,096 households, the 35th most populous of Indiana's 92 counties. The median household income is $74,331 a year, 3% above the Indiana median of $71,957 (US: $80,734). The median owner-occupied home is valued at $194,100 (11% below the Indiana median), and median gross rent is $861 a month. The median age is 38.4; 20.2% of adults 25 and over hold a bachelor's degree or higher (29.5% across Indiana); the average commute takes 21 minutes.

Population43,807DeKalb43,807
Households17,096DeKalb17,096
Median age38.4DeKalb38.4Indiana38.1US 38.9
Median household income$74,331DeKalb$74,331Indiana$71,957US $80,734
Median home value$194,100DeKalb$194,100Indiana$218,200US $332,700
Median gross rent$861DeKalb$861Indiana$1,062US $1,413
Bachelor's degree or higher20.2%DeKalb20.2%Indiana29.5%US 35.7%
Mean commute21.3 minDeKalb21.3 minIndiana24.1 minUS 26.4 min
Population density121 / sq miDeKalb121 / sq mi

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

Largest towns in DeKalb County

Largest towns in DeKalb County
TownZIP codesPopulation
Auburn 1 13,565
Garrett 1 6,642
Butler 1 2,660
Waterloo 1 2,073
Ashley 1 1,230
St. Joe 1 411
Spencerville 1 244
Corunna 1 128

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with DeKalb County.

Not sure you are in DeKalb County? What county am I in? answers from your location, near a county line included.

Every ZIP code in DeKalb County, with figures

ZIP codes in DeKalb County
ZIP City Type Population Median income Median home
46705 Ashley , IN Standard 1,972 $67,266 $159,700
46706 Auburn , IN Standard 20,403 $80,965 $219,100
46721 Butler , IN Standard 4,739 $68,580 $138,800
46730 Corunna , IN Standard 1,299 $116,181 $316,500
46738 Garrett , IN Standard 8,533 $57,545 $164,200
46785 Saint Joe , IN Standard 1,491 $63,250 $163,300
46788 Spencerville , IN Standard 4,373 $101,553 $285,200
46793 Waterloo , IN Standard 4,104 $79,949 $184,100

Cite this page

zipcodes.pro. “DeKalb County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/in/county/dekalb

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