🇺🇸 United States ZIP Code

STANDARD

37729

Duff

ZIP Code 37729 is a standard zip code serving Duff, Duff, Tennessee (TN), in Campbell County, United States. It has an estimated population of 1,456 with a median household income of $33,931. The area falls within the America/New_York timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Tennessee (TN)
County: Campbell
City: Duff
Timezone: America/New_York

Coordinates

Latitude: 36.508600
Longitude: -84.045400

Geographic Details

Land Area: 49.98 mi²
Population Density: 29.0 people per mi² (30th percentile)
Bounding Box: 36.587397°N, 36.427785°S, -83.943139°E, -84.132639°W

With 1,456 residents spread across 49.98 square miles, this area has a population density of 29.0 people per square mile.

Demographics

1,456

Population

35th percentile

$33,931

Median Income

15th percentile

$45,200

Median Home Value

49.98 mi²

Land Area

The median household income in 37729 is $33,931, and the median home value is $45,200. This is below the national average for household income.

Housing

656

Total Units

551

Occupied Units

84.0%

Occupancy Rate

Similar ZIP Codes in Tennessee

ZIP codes with similar median household income in Tennessee.

38541

Allons

$35,637

37206

Nashville

$37,369

38544

Baxter

$30,925

37091

Lewisburg

$37,174

37322

Decatur

$36,441

38040

Halls

$38,472

37708

Bean Station

$30,905

37846

Philadelphia

$30,440

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.