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/TN/COUNTY/DEKALB

DeKalb County, TN ZIP codes

DeKalb County, TN has 4 ZIP codes, in 4 towns: 37166, 37012, 37095 and 37059. 2 more cross into it from neighbouring counties: 38583 and 38582.

The county seat is Smithville.

ZIP codes
4
Partly in it
2 more
Towns
4
County seat
Smithville
County FIPS
47041
Population
20,959
Median household income
$53,153
Land area
304 sq mi

DeKalb County ZIP codes by town

Smithville (county seat)
37166

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.

ZIP codes partly in DeKalb County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of DeKalb County.

Map of DeKalb County ZIP codes

37012370593709537166

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 20,959 people live in DeKalb County, in 8,652 households, the 65th most populous of Tennessee's 95 counties. The median household income is $53,153 a year, 24% below the Tennessee median of $69,595 (US: $80,734). The median owner-occupied home is valued at $235,500 (18% below the Tennessee median), and median gross rent is $839 a month. The median age is 41.9; 20.8% of adults 25 and over hold a bachelor's degree or higher (31.1% across Tennessee); the average commute takes 29 minutes.

Population20,959DeKalb20,959
Households8,652DeKalb8,652
Median age41.9DeKalb41.9Tennessee38.9US 38.9
Median household income$53,153DeKalb$53,153Tennessee$69,595US $80,734
Median home value$235,500DeKalb$235,500Tennessee$286,700US $332,700
Median gross rent$839DeKalb$839Tennessee$1,189US $1,413
Bachelor's degree or higher20.8%DeKalb20.8%Tennessee31.1%US 35.7%
Mean commute29.3 minDeKalb29.3 minTennessee25.7 minUS 26.4 min
Population density69 / sq miDeKalb69 / 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
Smithville 1 5,288
Alexandria 1 1,136
Dowelltown 1 434
Liberty 1 406

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
37012 Alexandria , TN Standard 2,118 $49,265 $237,600
37059 Dowelltown , TN Standard 1,590 $49,510 $232,200
37095 Liberty , TN Standard 1,697 $64,792 $189,200
37166 Smithville , TN Standard 15,731 $52,797 $224,300

Cite this page

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

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