🇺🇸 United States ZIP Code

STANDARD

37166

Smithville

ZIP Code 37166 is a standard zip code serving Smithville, Smithville, Tennessee (TN), in DeKalb County, United States. It has an estimated population of 13,446 with a median household income of $36,382. The area falls within the America/Chicago timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Tennessee (TN)
County: DeKalb
City: Smithville
Timezone: America/Chicago

Coordinates

Latitude: 35.929900
Longitude: -85.804600

Geographic Details

Land Area: 154.76 mi²
Water Area: 11.47 mi²
Population Density: 87.0 people per mi² (50th percentile)
Bounding Box: 36.068758°N, 35.796301°S, -85.631858°E, -85.925644°W

With 13,446 residents spread across 154.76 square miles, this area has a population density of 87.0 people per square mile.

Demographics

13,446

Population

70th percentile

$36,382

Median Income

20th percentile

$116,500

Median Home Value

45th percentile

154.76 mi²

Land Area

The median household income in 37166 is $36,382, and the median home value is $116,500. This is below the national average for household income.

Housing

6,390

Total Units

5,207

Occupied Units

81.5%

Occupancy Rate

Similar ZIP Codes in Tennessee

ZIP codes with similar median household income in Tennessee.

37818

Mosheim

$36,203

37642

Church Hill

$40,561

37920

Knoxville

$36,942

37891

Whitesburg

$31,152

38049

Mason

$32,386

37711

Bulls Gap

$34,384

38544

Baxter

$30,925

38229

Gleason

$36,800

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.