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/UNION

Union County, TN ZIP codes

Union County, TN has 3 ZIP codes, in 3 towns: 37807, 37779 and 37866. 1 more crosses into it from a neighbouring county: 37705.

The county seat is Maynardville.

ZIP codes
3
Partly in it
1 more
Towns
3
County seat
Maynardville
County FIPS
47173
Population
20,431
Median household income
$62,727
Land area
224 sq mi
Metro area
Knoxville

Union County ZIP codes by town

Maynardville (county seat)
37807

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 Union County

This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Union County.

Map of Union County ZIP codes

377793780737866

The ZIP codes of Union 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.

Union County in numbers

About 20,431 people live in Union County, in 7,931 households, the 66th most populous of Tennessee's 95 counties. The median household income is $62,727 a year, 10% below the Tennessee median of $69,595 (US: $80,734). The median owner-occupied home is valued at $204,000 (29% below the Tennessee median), and median gross rent is $847 a month. The median age is 42.7; 14.2% of adults 25 and over hold a bachelor's degree or higher (31.1% across Tennessee); the average commute takes 35 minutes.

Population20,431Union20,431
Households7,931Union7,931
Median age42.7Union42.7Tennessee38.9US 38.9
Median household income$62,727Union$62,727Tennessee$69,595US $80,734
Median home value$204,000Union$204,000Tennessee$286,700US $332,700
Median gross rent$847Union$847Tennessee$1,189US $1,413
Bachelor's degree or higher14.2%Union14.2%Tennessee31.1%US 35.7%
Mean commute34.6 minUnion34.6 minTennessee25.7 minUS 26.4 min
Population density91 / sq miUnion91 / 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 Union County

Largest towns in Union County
TownZIP codesPopulation
Maynardville 1 2,528
Sharps Chapel 1 2,468
Luttrell 1 1,158

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 Union County.

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

Every ZIP code in Union County, with figures

ZIP codes in Union County
ZIP City Type Population Median income Median home
37779 Luttrell , TN Standard 3,649 $51,357 $162,900
37807 Maynardville , TN Standard 11,069 $62,673 $215,100
37866 Sharps Chapel , TN Standard 2,468 $77,091 $279,000

Cite this page

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

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