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County ZIP codes · Tennessee · FIPS 47041

DeKalb County, TN ZIP Codes

DeKalb County, Tennessee has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in DeKalb County and 7 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $49,265 in 37012 (Alexandria) to $69,823 in 38544 (Baxter) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of DeKalb County?

37012 · Alexandria: $49k37059 · Dowelltown: $50k37095 · Liberty: $65k37166 · Smithville: $53k38544 · Baxter: $70k38548 · Buffalo Valley: –38567 · Hickman: $100k38569 · Lancaster: –38581 · Rock Island: $56k38582 · Silver Point: $93k38583 · Sparta: $55k3858337166385813709538544385823701238548385693856737012 · Alexandria: $49k37059 · Dowelltown: $50k37095 · Liberty: $65k37166 · Smithville: $53k38544 · Baxter: $70k38548 · Buffalo Valley: –38567 · Hickman: $100k38569 · Lancaster: –38581 · Rock Island: $56k38582 · Silver Point: $93k38583 · Sparta: $55k3858337166385813709538544385823701238548385693856737012 · Alexandria: $49k37059 · Dowelltown: $50k37095 · Liberty: $65k37166 · Smithville: $53k38544 · Baxter: $70k38548 · Buffalo Valley: –38567 · Hickman: $100k38569 · Lancaster: –38581 · Rock Island: $56k38582 · Silver Point: $93k38583 · Sparta: $55k38583371663858137095385443701238548
The residential ZIP codes of DeKalb County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $52,797 and $55,985.

They carry 11 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 11 residential ZIP codes in DeKalb County

4 ZIP codes lie mainly in DeKalb County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in DeKalb County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
37166 Smithville 15,731 102 $53k $224k 91%
37012 Alexandria 2,118 57 $49k $238k 58%
37095 Liberty 1,697 22 $65k $189k 76%
37059 Dowelltown 1,590 57 $50k $232k 100%

Partly in DeKalb County

Residential ZIP codes mainly in another county that reach at least 1% into DeKalb County, by their share here
In this county
38569 Lancaster 390 29 – $363k 48%
38582 Silver Point 1,729 37 $93k $245k 41%
38567 Hickman 1,065 51 $100k $341k 12%
38544 Baxter 8,175 103 $70k $245k 9%
38583 Sparta 25,584 70 $55k $208k 5%
38548 Buffalo Valley 1,154 41 – $269k 3%
38581 Rock Island 4,079 42 $56k $183k 1%

Download the 11 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

10 ZIP codes of DeKalb County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in DeKalb County and in the neighboring counties
ZIPIn DeKalbElsewhere
385835%White County 82%; Putnam County 6%; Cumberland County 5%; Van Buren County 2%
3716691%Warren County 7%; Cannon County 2%
385449%Putnam County 91%
385811%Warren County 53%; Van Buren County 45%
3701258%Wilson County 22%; Smith County 20%
3858241%Putnam County 59%
3709576%Cannon County 22%; Wilson County 2%
385483%Putnam County 64%; Smith County 33%
3856712%Smith County 88%
3856948%Smith County 52%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do DeKalb County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. DeKalb County's ZIP codes use 3 prefixes: 370, 371 and 385.

Three-digit prefixes of DeKalb County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are DeKalb County's
PrefixSectional centerHereAll codes
370 Nashville, TN (SCF 370) 3 77
371 Nashville, TN (SCF 370) 1 57
385 Nashville, TN (SCF 370) 7 49

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.