County ZIP codes · Tennessee · FIPS 47153

Sequatchie County, TN ZIP Codes

Sequatchie County, Tennessee has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 1 of the residential ones lie mainly in Sequatchie County and 7 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $52,932 in 37110 (McMinnville) to $119,636 in 37377 (Signal Mountain) (Census Bureau, ACS 2020-2024).

ACS2020-24
Census2020

Where are the ZIP codes of Sequatchie County?

The residential ZIP codes of Sequatchie 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?

37110 · $53k 37377 · $120k

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $54,750 and $60,584.

They carry 8 postal town names: McMinnville, Soddy Daisy, Signal Mountain, Dunlap, Whitwell, Spencer, Graysville, Palmer.

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

All 8 residential ZIP codes in Sequatchie County

1 ZIP code lies mainly in Sequatchie County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Sequatchie County, largest first; "In this county" is the share of the ZIP's land in the county
						In this county
37327	Dunlap	13,480	70	$61k	$246k	82%

Partly in Sequatchie County

Residential ZIP codes mainly in another county that reach at least 1% into Sequatchie County, by their share here
						In this county
37377	Signal Mountain	17,188	214	$120k	$530k	46%
37365	Palmer	1,678	30	$55k	$131k	29%
37338	Graysville	3,309	46	$50k	$122k	20%
37397	Whitwell	10,488	70	$55k	$173k	15%
37379	Soddy Daisy	29,430	277	$89k	$307k	6%
38585	Spencer	4,084	22	$48k	$153k	2%
37110	McMinnville	34,296	92	$53k	$198k	2%

Download the 8 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?

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

Share of each ZIP code's land in Sequatchie County and in the neighboring counties
ZIP	In Sequatchie	Elsewhere
37110	2%	Warren County 79%; Grundy County 15%; Van Buren County 3%; Cannon County 2%
37379	6%	Hamilton County 88%; Bledsoe County 6%
37377	46%	Hamilton County 50%; Marion County 4%
37327	82%	Bledsoe County 16%; Van Buren County 2%
37397	15%	Marion County 85%
38585	2%	Van Buren County 98%
37338	20%	Bledsoe County 58%; Hamilton County 16%; Rhea County 5%
37365	29%	Grundy County 71%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Sequatchie County's ZIP codes use 3 prefixes: 371, 373 and 385.

Three-digit prefixes of Sequatchie 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 Sequatchie County's
Prefix	Sectional center	Here	All codes
371	Nashville, TN (SCF 370)	1	57
373	Chattanooga, TN (SCF 373)	6	87
385	Nashville, TN (SCF 370)	1	49

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