🇺🇸 United States ZIP Code

STANDARD

83440

Rexburg

ZIP Code 83440 is a standard zip code serving Rexburg, Rexburg, Idaho (ID), in Madison County, United States. It has an estimated population of 34,610 with a median household income of $31,441. The area falls within the America/Boise timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: Idaho (ID)
County: Madison
City: Rexburg
Timezone: America/Boise

Coordinates

Latitude: 43.810000
Longitude: -111.789000

Geographic Details

Land Area: 170.52 mi²
Water Area: 3.28 mi²
Population Density: 203.0 people per mi² (60th percentile)
Bounding Box: 43.942378°N, 43.662310°S, -111.566375°E, -111.977946°W

With 34,610 residents spread across 170.52 square miles, this area has a population density of 203.0 people per square mile.

Demographics

34,610

Population

90th percentile

$31,441

Median Income

10th percentile

$171,300

Median Home Value

65th percentile

170.52 mi²

Land Area

The median household income in 83440 is $31,441, and the median home value is $171,300. This is below the national average for household income.

Housing

10,622

Total Units

10,006

Occupied Units

94.2%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Rexburg, ID.

83441

Rexburg

83460

Rexburg

Similar ZIP Codes in Idaho

ZIP codes with similar median household income in Idaho.

83536

Kamiah

$35,546

83622

Garden Valley

$32,917

83539

Kooskia

$32,778

83631

Idaho City

$28,224

83639

Marsing

$32,878

83811

Clark Fork

$27,750

83467

Salmon

$34,936

83845

Moyie Springs

$34,145

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.