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County ZIP codes · Tennessee · FIPS 47115

Marion County, TN ZIP Codes

Marion County, Tennessee has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 9 of the residential ones lie mainly in Marion County and 3 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $54,750 in 37397 (Whitwell) to $119,636 in 37377 (Signal Mountain) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Marion County?

37340 · Guild: $13k37347 · Jasper: $63k37356 · Monteagle: $59k37374 · Sequatchie: $68k37375 · Sewanee: $71k37377 · Signal Mountain: $120k37380 · South Pittsburg: $59k37387 · Tracy City: $47k37396 · Whiteside: $26k37397 · Whitwell: $55k37405 · Chattanooga: $81k37419 · Chattanooga: $75k37380373973737537405373873737737419373743734737356373403739637340 · Guild: $13k37347 · Jasper: $63k37356 · Monteagle: $59k37374 · Sequatchie: $68k37375 · Sewanee: $71k37377 · Signal Mountain: $120k37380 · South Pittsburg: $59k37387 · Tracy City: $47k37396 · Whiteside: $26k37397 · Whitwell: $55k37405 · Chattanooga: $81k37419 · Chattanooga: $75k37380373973737537405373873737737419373743734737356373403739637340 · Guild: $13k37347 · Jasper: $63k37356 · Monteagle: $59k37374 · Sequatchie: $68k37375 · Sewanee: $71k37377 · Signal Mountain: $120k37380 · South Pittsburg: $59k37387 · Tracy City: $47k37396 · Whiteside: $26k37397 · Whitwell: $55k37405 · Chattanooga: $81k37419 · Chattanooga: $75k37380373973737537405373873737737419373743734737356
The residential ZIP codes of Marion 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 $59,026 and $71,204.

They carry 11 postal town names.

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

All 12 residential ZIP codes in Marion County

9 ZIP codes lie mainly in Marion County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Marion County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
37405 Chattanooga 18,109 333 $81k $461k 75%
37397 Whitwell 10,488 70 $55k $173k 85%
37347 Jasper 8,607 176 $63k $194k 100%
37380 South Pittsburg 6,688 53 $59k $195k 98%
37419 Chattanooga 5,980 122 $75k $352k 51%
37356 Monteagle 2,679 109 $59k $298k 56%
37374 Sequatchie 1,497 26 $68k $257k 100%
37340 Guild 288 34 $13k – 100%
37396 Whiteside 44 9 $26k – 100%

Partly in Marion County

Residential ZIP codes mainly in another county that reach at least 1% into Marion County, by their share here
In this county
37375 Sewanee 3,866 56 $71k $367k 32%
37387 Tracy City 3,674 50 $47k $164k 31%
37377 Signal Mountain 17,188 214 $120k $530k 4%

Download the 12 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 Marion County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Marion County and in the neighboring counties
ZIPIn MarionElsewhere
3740575%Hamilton County 25%
373774%Hamilton County 50%; Sequatchie County 46%
3739785%Sequatchie County 15%
3738098%Franklin County 2%
3741951%Hamilton County 49%
3737532%Franklin County 68%
3738731%Grundy County 69%
3735656%Grundy County 43%; Franklin County 1%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Marion County's ZIP codes use 2 prefixes: 373 and 374.

Three-digit prefixes of Marion 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 Marion County's
PrefixSectional centerHereAll codes
373 Chattanooga, TN (SCF 373) 10 87
374 Chattanooga, TN (SCF 373) 2 20

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