Smithville, TN · standard
ZIP Code 37166
DeKalb County, Tennessee - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 13,446
- 34/sq mi Moderate-density area
- $52,797
- Median income Below-median income area
- $224,300
- Median home value Near-median home value
- 20.1%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Smithville pairs one of the lowest household incomes in the country with above-median home values, in a rural, homeowner-dominated area.
- 18th pct
- household income, US ZIPs
- Top 49%
- home value, US ZIPs
- 34
- people per sq mi
- 72%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 37166 against every reporting US ZIP.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 37166 (Smithville, TN) rose +13.1% from 2023 to 2024. The all-transactions index moved from 289.4 in 2023 to 327.3 in 2024 (2000 = 100).
ZIP code 37166 is a mid-sized community (a standard USPS delivery area) in Smithville, DeKalb County, Tennessee, home to 13,446 residents across 401.4 square miles, a density of 34 people per square mile, in the Chicago time zone.
ZIP 37166 reports a modest median household income of $52,797 (21% below the average Tennessee ZIP), while per-capita income is $26,766. The poverty rate is 18.7%, with unemployment at 4.6%; those measures add context to the income figure. Median home value is $224,300 (9% below the average Tennessee ZIP) and median rent is $813; 71.8% of occupied homes are owner-occupied.
Educational attainment sits below the national norm: 20.1% of adults hold a bachelor's degree or higher, the median age is 41.2, and the average commute is 26 minutes. The page also surfaces 1 ZIP codes within roughly 10 miles and 3 more in DeKalb County, so 37166 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 37166
Top 5 sectors by establishment count in Smithville, TN
Which industries have the most business establishments in ZIP 37166.
- Retail trade
Retail trade
53 establishments
- Health care and social assistance
Health care and social assistance
36 establishments
- Accommodation and food services
Accommodation and food services
27 establishments
- Other services (except public administration)
Other services (except public administration)
26 establishments
- Construction
Construction
23 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 37166, Smithville, TN · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
13,446
Population
401.4
Area (sq mi)
34
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 37166?
41.2
Median Age
49.2%
Male
50.8%
Female
6.1%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$52,797
Median Household Income
-21% vs state ZIP avg
$26,766
Per Capita Income
18.7%
Poverty Rate
4.6%
Unemployment Rate
26.1 min
Mean Commute Time
How ZIP 37166 ranks among Tennessee ZIPs
Smithville, TN household income vs. every Tennessee ZIP code
Median household income among 593 reporting Tennessee ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$52,797 29th percentile higher than 29% of 593 Tennessee ZIPs
Each bar is a $20K-wide band; taller bars hold more Tennessee ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
7,205housing units
7,205
Total Housing Units
6,300
Occupied Units
905
Vacant Units
2.46
Avg Household Size
Occupancy Type
$224,300
Median Home Value
-9% vs state ZIP avg
$813
Median Rent
1988
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How have home values changed over time?
FHFA House Price Index, annual appreciation data based on repeat sales and appraisals
+13.1%
YoY Change (2024)
327
HPI Index (2000 = 100)
+227%
Total Change Since 2000
Home values in ZIP 37166 have increased 13.1% over the past year (2024). Since 2000, this ZIP has seen +227% cumulative appreciation.
| Year | Annual Change | HPI Index |
|---|---|---|
| 2020 | +5.8% | 191 |
| 2021 | +17.8% | 225 |
| 2022 | +24.5% | 280 |
| 2023 | +3.5% | 289 |
| 2024 | +13.1% | 327 |
Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.
What businesses operate in this ZIP?
Census Bureau data shows 260 business establishments in ZIP 37166, employing approximately 3,781 people with a combined annual payroll of $150,881,000.
260
Businesses
3,781
Employees
$150.9M
Annual Payroll
14
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Retail trade | 53 | 20.4% |
| Health care and social assistance | 36 | 13.8% |
| Accommodation and food services | 27 | 10.4% |
| Other services (except public administration) | 26 | 10.0% |
| Construction | 23 | 8.8% |
| Professional, scientific, and technical services | 18 | 6.9% |
| Finance and insurance | 17 | 6.5% |
| Manufacturing | 14 | 5.4% |
| Administrative and support and waste management and remediation services | 13 | 5.0% |
| Real estate and rental and leasing | 10 | 3.9% |
| Arts, entertainment, and recreation | 7 | 2.7% |
| Information | 5 | 1.9% |
| Transportation and warehousing | 4 | 1.5% |
| Wholesale trade | 3 | 1.1% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 37166 vs 37059 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 37059 | Dowelltown, TN | 1,552 | 8.0 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 37166, both outside TN so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (13,446 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in DeKalb County
Related Areas
Frequently Asked Questions
What county is ZIP code 37166 in?
ZIP code 37166 (Smithville) is located in DeKalb County, Tennessee. DeKalb County contains multiple ZIP codes, see the full list at /counties/dekalb-tn.
What is the population of ZIP code 37166?
ZIP code 37166 in Smithville, TN has a population of 13,446 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 37166?
The median household income in ZIP 37166 is $52,797, which is 31% below the national average of $76,288.
What is the average home value in ZIP 37166?
The median home value in ZIP 37166 is $224,300, which is 19% below the national average of $278,155.
What is the demographic makeup of ZIP 37166?
The largest racial group in ZIP 37166 is White at 86.3%. Hispanic or Latino residents make up 10.1% of the population.
How many businesses are in ZIP code 37166?
ZIP code 37166 has 260 business establishments employing approximately 3,781 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 37166?
The top industries by establishment count in ZIP 37166 are: Retail trade (53), Health care and social assistance (36), Accommodation and food services (27). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 37166?
According to the FHFA House Price Index, home values in ZIP 37166 increased by 13.1% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 227%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 37166?
In ZIP code 37166, 58.8% of residents aged 25+ have a high school diploma or higher, and 20.1% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 37166?
The mean commute time for workers in ZIP code 37166 is 26.1 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 37166?
In ZIP code 37166, approximately 71.8% of occupied housing units are owner-occupied and 28.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 37166?
The poverty rate in ZIP code 37166 is 18.7% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 37166's numbers, next.
- See how ZIP 37166 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Smithville, TN ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.