What city is ZIP code 37766?

ZIP code 37766 is in Fincastle, TN (Campbell County).

What county is ZIP code 37766 in?

ZIP code 37766 is mostly in Campbell County, Tennessee.

How many people live in ZIP code 37766?

About 18,554 people live in the 37766 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Checked Oct 26, 2026

ZIP Code 37766

Fincastle, TN, Campbell County

Population

18,554

Land area

137.3sq mi

People per sq mi

135

City

Fincastle

ZIP 37766 and nearby ZIP codes

Full map

ZIP 37766 at a glance

Households here earn a median of $50,063 a year, 28% less than the Tennessee figure of $69,595.
A typical owner-occupied home is valued at $187,900 (34% below Tennessee) and median rent is $756 a month.

Local data for ZIP 37766

Counts from official public data

Housing and community stats

ZIP 37766, American Community Survey 2020-2024

Full profile

Median household income

$50,063

Poverty rate

21.6%

Median home value

$187,900

Prices -1.6% in a year

Median rent

$756/mo

Homeownership

62.9%

Bachelor's or higher

10.8%

Median age

41.8

Average commute

30.1 min

Income, education and commute

Economy and federal money

Businesses, pandemic loans and political donations

Details

Business establishments

293

ZIP Business Patterns 2023

Employees

3,485

$129M annual payroll

PPP loans

$15.1M

450 loans

Campaign donations

$61.1K

8% D, 75% R, 2026 cycle

PPP loans in this ZIP

Environment and hazard risk

ZIP 37766, from FEMA, NOAA and EPA

Full report

Natural hazard risk

Relatively Low

Top: landslide

Storm events since 1996

333

Countywide, mostly thunderstorm wind

Flood insurance policies

0.3% of homes, county

July high / Jan low

86° / 26°F

54.6 inches of rain a year

Hazards, floods and storm history Check a flood zone

Health statistics

Share of adults in ZIP 37766, CDC PLACES estimates

All 40 measures

Obesity

43.4%

U.S. 33.3% +10.1 pts

Diabetes

16.8%

U.S. 12.1% +4.7 pts

Smoking

24.3%

U.S. 12.8% +11.5 pts

Uninsured (18-64)

13.8%

U.S. 11.1% +2.7 pts

Frequently asked questions

What city is ZIP code 37766?: ZIP code 37766 is in Fincastle, TN (Campbell County).
What county is ZIP code 37766 in?: ZIP code 37766 is mostly in Campbell County, Tennessee.
How many people live in ZIP code 37766?: About 18,554 people live in the 37766 ZIP Code Tabulation Area, based on American Community Survey 5-year estimates.

Source: U.S. Census Bureau (ZIP Code Tabulation Areas, American Community Survey) · Data as of 12/31/2023. ZIP Code Tabulation Areas closely match, but are not identical to, USPS ZIP code delivery areas.