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County ZIP codes · Tennessee · FIPS 47179

Washington County, TN ZIP Codes

Washington County, Tennessee has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 12 residential and 3 for PO boxes or a single organization. 8 of the residential ones lie mainly in Washington County and 4 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $50,654 in 37650 (Erwin) to $77,525 in 37615 (Johnson City) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Washington County?

37601 · Johnson City: $51k37604 · Johnson City: $52k37614 · Johnson City: –37615 · Johnson City: $78k37641 · Chuckey: $67k37650 · Erwin: $51k37656 · Fall Branch: $64k37659 · Jonesborough: $71k37663 · Kingsport: $76k37681 · Limestone: $66k37690 · Telford: $74k37694 · Watauga: $81k376413765937650376813760137690376153760437656376633769437601 · Johnson City: $51k37604 · Johnson City: $52k37614 · Johnson City: –37615 · Johnson City: $78k37641 · Chuckey: $67k37650 · Erwin: $51k37656 · Fall Branch: $64k37659 · Jonesborough: $71k37663 · Kingsport: $76k37681 · Limestone: $66k37690 · Telford: $74k37694 · Watauga: $81k376413765937650376813760137690376153760437656376633769437601 · Johnson City: $51k37604 · Johnson City: $52k37614 · Johnson City: –37615 · Johnson City: $78k37641 · Chuckey: $67k37650 · Erwin: $51k37656 · Fall Branch: $64k37659 · Jonesborough: $71k37663 · Kingsport: $76k37681 · Limestone: $66k37690 · Telford: $74k37694 · Watauga: $81k376413765937650376813760137615376563766337694
The residential ZIP codes of Washington 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 $52,345 and $71,110.

They carry 9 postal town names.

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

All 12 residential ZIP codes in Washington County

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

Residential ZIP codes mainly in Washington County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
37604 Johnson City 39,097 1,184 $52k $260k 94%
37601 Johnson City 38,008 796 $51k $216k 53%
37659 Jonesborough 29,080 229 $71k $250k 99%
37615 Johnson City 22,821 606 $78k $295k 100%
37681 Limestone 5,723 88 $66k $177k 63%
37690 Telford 4,722 187 $74k $246k 100%
37656 Fall Branch 3,849 132 $64k $237k 63%
37614 Johnson City 2,767 5,613 – – 100%

Partly in Washington County

Residential ZIP codes mainly in another county that reach at least 1% into Washington County, by their share here
In this county
37641 Chuckey 9,733 104 $67k $199k 18%
37663 Kingsport 14,230 553 $76k $239k 5%
37650 Erwin 12,774 132 $51k $168k 4%
37694 Watauga 1,729 137 $81k $203k 3%

Download the 15 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?

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

Share of each ZIP code's land in Washington County and in the neighboring counties
ZIPIn WashingtonElsewhere
3760494%Carter County 6%
3760153%Carter County 45%; Unicoi County 3%
3765999%
376635%Sullivan County 95%
376504%Unicoi County 96%
3764118%Greene County 82%
3768163%Greene County 37%
3765663%Greene County 29%; Sullivan County 8%
376943%Carter County 79%; Sullivan County 18%

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

PO Box and single-organization ZIP codes

ZIP codes in Washington County without a residential area (GeoNames postal codes)
ZIPPostal name
37602Johnson City
37605Johnson City
37684Mountain Home

Source: GeoNames postal codes (CC BY 4.0).

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Washington County starts with 376.

Three-digit prefixes of Washington 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 Washington County's
PrefixSectional centerHereAll codes
376 Johnson City, TN (SCF 376) 15 42

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