ZIP Codes of Sullivan County, TN

Population & People
Population & People
Total Population
163,515
Household Income
Household Income
Median Income
$63,606
Housing
Housing
Total Housing Units
78,011
Business & Economy
Business & Economy
Total Businesses
3,453
Employment
Employment
Employment Rate
52.93%
Education
Education
Bachelor's Degree+
27.02%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 13 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:13 ZIP Codes (8 Standard, 3 PO Box, 2 Unique) [See All]
Area Code:423
Timezone:Eastern (GMT -05:00)
Local Time:2:13:49 PM
Population:163,515 [See All]
FIPS:47163
CBSA:Kingsport-Bristol, TN-VA
Land Area:431 sq mi
Water Area:16 sq mi
Coordinates:36.5165, -82.3885
Quick Link:
https://www.zip-codes.com/county/tn-sullivan.asp
Need Sullivan data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Among Tennessee's 10 most populous counties
#9 of 95 counties with 163,515 residents.

Standout ZIPs in this County


Most Populous
Kingsport · 40,996 people
25.1% of county total
Highest Income
Piney Flats · $84,264 median
1.3× county average
Largest Land Area
Bristol · 138.4 sq mi
Spans the most ground
Fastest Growth
Piney Flats · 24.6% (10-yr)
7,622 → 9,495 residents
Most Educated
Piney Flats · 35.5% bachelor's+
2,411 of 6,795 adults 25+

Things worth knowing about Sullivan County


163,515 residents live across 13 ZIPs covering 431 sq mi, served by 5 distinct USPS-recognized cities.

Population moved from 160,283 to 163,515 from 2014 to 2024 — a +2.0% change. 5 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 37686 (Piney Flats, $84,264 median) and poorest ZIP 37660 (Kingsport, $49,191) are 13.8 miles apart — a 1.7× income gap across local geography.

Median home values vary 2.6× across this county — from $134,400 in 37665 (Kingsport) to $352,200 in 37686 (Piney Flats).

Density varies across the county — from 181 people/sq mi in 37618 (Bluff City) to 1,583 in 37665 (Kingsport).

Educational attainment ranges from 18.2% bachelor's+ in 37665 (Kingsport) to 35.5% in 37686 (Piney Flats) — the breadth of educational profiles across the area.

Within Tennessee, this is the #9 most populous of 95 counties and ranks #39 for median household income .

Hosts 2 single-entity Unique ZIPs: 37699Home Shopping Network ; and 37669Kingsport Book .

Weighted by population, the typical household earns about $60,276 across the county — reflecting what a typical resident sees, not a simple ZIP average.

27.0% of adults age 25+ hold a bachelor's degree or higher (32,439 of 120,060 reporting). The most-educated ZIPs cluster around Kingsport.

8 Standard delivery, 3 PO Box only, 2 single-entity Unique ZIPs serve this county.

All ZIP Codes in Sullivan County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
37660KingsportStandard40,996$49,19168.31.5%
37620BristolStandard38,494$56,128138.41.4%
37664KingsportStandard28,267$63,65333.37.3%
37617BlountvilleStandard14,744$64,76459.16.0%
37663KingsportStandard14,230$76,00727.2-1.1%
37618Bluff CityStandard12,548$63,85169.2-7.4%
37686Piney FlatsStandard9,495$84,26432.624.6%
37665KingsportStandard4,741$50,9913.0-22.4%
37621BristolPO Box0.0
37699Piney FlatsUnique0.0
37662KingsportPO Box0.0
37669KingsportUnique0.0
37625BristolPO Box0.0

Adjacent & Nearby Counties