37650 ZIP Code Profile, Map, Data & Demographics

ZIP Code Type: STANDARD
County: Unicoi County
Centroid: Latitude 36.141, Longitude -82.409
Time Zone: Eastern Time Zone (UTC -5 hours)
Observes DST: Yes

ZIP Code 37650 has segments in 2 Counties (Unicoi, Washington).

Businesses Addresses: 446
PO Box Addresses: 353
Residential Addresses: 5,713

Multi-Family Addresses: 107
Single Family Addresses: 5,606

The ZIP Code maps and database are updated 4 times per year.
Database updated: October 1, 2025, Maps updated: May 1, 2024.

Erwin, TN 37650 Data & Demographics (As of July 1, 2025)

POPULATION
Total Population	11,933 (100%)
Population in Households	11,648 (97.6%)
Population in Families	9,198 (77.1%)
Population in Group Quarters¹	285 ( 2.4%)
Population Density	126
Diversity Index²	28


INCOME
Median Household Income	$54,691
Average Household Income	$70,114
% of Income for Mortgage⁴	19%
Per Capita Income	$30,600
Wealth Index⁵	57
Socioeconomic Status Index⁶	Moderate (45.9)

HOUSING
Total HU (Housing Units)	5,893 (100%)
Owner Occupied HU	3,794 (64.4%)
Renter Occupied HU	1,407 (23.9%)
Vacant Housing Units	692 (11.7%)
Median Home Value	$166,334
Average Home Value	$212,859
Housing Affordability Index³	123

HOUSEHOLDS
Total Households	5,201
Average Household Size	2.24
Family Households	3,131
Average Family Size	3.00

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.

Erwin, TN 37650 - Peer Comparisons by Rank and Percentile

The table below compares 37650 to the other 612 ZIP Codes in Tennessee by rank and percentile using July 1, 2025 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

GROWTH RATE / YEAR	2020-2025	2025-2030
Population	-0.44%	-0.21%
Households	-0.15%	0.02%
Families		-0.22%
Median Household Income		2.85%
Per Capita Income		2.63%
Owner Occupied HU		0.30%

Variable Description	Rank	Percentile
Total Population	# 191	69th
Population Density	# 239	61st
Median Household Income	# 415	32nd
Housing Affordability Index	# 524	86th
Per Capita Income	# 384	37th
Diversity Index	# 270	56th

37650 ZIP Code Profile, Map, Data & Demographics

ZIP Code 37650: Basic Data & USPS Preferred City Name

Erwin, TN 37650 Data & Demographics (As of July 1, 2025)

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Erwin, TN 37650 - Peer Comparisons by Rank and Percentile

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