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Johnson County, TN
2 cities and towns and 5 ZIP codes in Johnson County, Tennessee.
Population
18,196
Land area
298sq mi
People per sq mi
61
ZIP codes
5
Cities and towns in Johnson County
Johnson County at a glance
- Johnson County is 64% less dense than Tennessee as a whole.
- Households here earn a median of $53,129 a year, 24% less than the Tennessee figure of $69,595.
- A typical owner-occupied home is valued at $178,600 (38% below Tennessee) and median rent is $674 a month.
- The biggest population centers are Mountain City (2,542) and Butler (127).
Local data for Johnson County, TN
Counts from official public data
Housing and community stats
Johnson County, TN, American Community Survey 2020-2024
Median household income
$53,129
Poverty rate
21.4%
Median home value
$178,600
Prices -4.0% in a year
Median rent
$674/mo
Homeownership
77.5%
Bachelor's or higher
17.5%
Median age
46.7
Average commute
25.6 min
Largest reported origins and ancestries: German Americans (1,574), Irish Americans (1,386), Scottish Americans (659).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
4.2%
Sep 2026, -0.7 pts in a year
Average annual pay
$56,250
4,187 jobs, 2025
Income per person
$43,934
BEA, 2024
Federal spending
$153M
FY 2026, $8,522 per person
PPP loans
$10.1M
366 loans, 1,256 jobs reported
Campaign donations
$43.8K
Itemized, 2026 cycle
How people get to work
Johnson County, TN, workers 16 and older. American Community Survey 5-year estimates
- Drove alone78.4%
- Carpooled10.7%
- Public transit0.0%
- Walked0.1%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other1.2%
- Worked from home9.7%
Average one-way commute: 25.6 minutes for people who do not work from home.
Environment and hazard risk
Johnson County, TN, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: landslide
Storm events since 1996
224
Most often thunderstorm wind
Flood insurance policies
104
1.1% of homes, county
July high / Jan low
82° / 23°F
47.2 inches of rain a year
Hazards, floods and storm historyCheck a flood zone6 historic places
Health statistics
Share of adults in Johnson County, TN, CDC PLACES estimates
Obesity
40.0%
U.S. 33.3% +6.7 pts
Diabetes
17.5%
U.S. 12.1% +5.4 pts
Smoking
23.2%
U.S. 12.8% +10.4 pts
Uninsured (18-64)
14.2%
U.S. 11.1% +3.1 pts
Cities, towns and ZIP codes in Johnson County
Population shown
Frequently asked questions
- What is the largest city in Johnson County, TN?
- Mountain City is the largest city or town in Johnson County, with about 2,542 residents.
- How many ZIP codes are in Johnson County?
- Johnson County includes 5 ZIP Code Tabulation Areas, including 37640, 37680, 37683, 37688, 37691.
- What is the population of Johnson County, TN?
- About 18,196 people live in Johnson County, based on American Community Survey 5-year estimates.
- What counties border Johnson County?
- Johnson County borders Sullivan County, Carter County, Watauga County, NC, Washington County, VA, Ashe County, NC, Avery County, NC, Grayson County, VA.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023