Zip Code 83440
Rexburg, Idaho — Madison County
📍 ZIP code 83440 is in Rexburg, Madison County, Idaho.
ZIP code 83440 is located in Rexburg, Madison County, Idaho. It is a zip code in the Mountain (MST/MDT) Time Zone with an estimated population of 50,669. The area code for ZIP code 83440 is 208.
Quick Answer
Zip code 83440 is in Rexburg, Idaho (Madison County). It has a population of 50,669, median household income of $57,701, and median home value of $372,800.
Population
50,669
Income
$57,701
Home Value
$372,800
Climate
85°F / 13°F
About Zip Code 83440
Zip code 83440 is located in Rexburg, Idaho, within Madison County. Home to approximately 50,669 residents, this area sits at an elevation of 4850 ft and falls within the Mountain (MST/MDT) timezone. The local area code is 208.
The median household income is $57,701 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $372,800, and the cost of living index is 99 (1% below the national average of 100).
Summers average a high of 85°F while winters drop to 13°F. The area receives about 12 in of rain and 50 in of snow annually. The zip code covers 170.4 square miles of land area and 3.3 square miles of water.
Key Statistics
50,669
$57,701
$372,800
Mountain (MST/MDT)
208
4850 ft
170.4 sq mi
21.3
13,845
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Compare With Nearby Zip Codes
| Metric | 83440 | 83448 | 83434 | 83451 | 83442 | 83445 |
|---|---|---|---|---|---|---|
| City | Rexburg, ID | Sugar City, ID | Menan, ID | Teton, ID | Rigby, ID | Saint Anthony, ID |
| Population | 50,669 | 3,074 | 1,754 | 902 | 24,829 | 7,514 |
| Median Income | $57,701 | $77,564 | $85,625 | $76,563 | $84,328 | $67,759 |
| Home Value | $372,800 | $331,100 | $240,400 | $288,800 | $376,800 | $233,700 |
| Cost of Living | 99 | 99 | 93 | 80 | 108 | 77 |
| Median Age | 21.3 | 27.6 | 40.7 | 35.4 | 31.8 | 34.8 |
Cost of Living
100 = National Average. Rexburg's cost of living is 1% below the national average.
vs. State Avg
Below
Affordability
Affordable
Income-to-Home
6.5x
Demographics
Zip code 83440 has a population of 50,669 people with a median age of 21.3. There are 13,845 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Rexburg (83440) population trend from 2010 to 2024
↑ 18.9%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
85°F
13°F
12 in
50 in
Rexburg experiences warm summers with average highs around 85°F. Winters are cold with lows averaging 13°F. With 50 in of annual snowfall, residents should be prepared for significant winter weather.
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Housing & Economy
Median Home Value
$372,800
Median Household Income
$57,701
With 13,845 housing units across 170.4 square miles, 83440 has a housing density of 81 units per square mile. The home price-to-income ratio is 6.5x.
Location & Geography
Latitude
43.8156°
Longitude
-111.8235°
Land Area
170.4 sq mi
Water Area
3.3 sq mi
Nearby Zip Codes
Zip codes closest to 83440 (Rexburg, ID) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 83440's $57,701. A way to compare Rexburg to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 83440 (Rexburg, ID). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Rexburg, Idaho?
Rexburg, Idaho uses zip code 83440.
What county is zip code 83440 in?
Zip code 83440 is located in Madison County, Idaho.
What is the population of zip code 83440?
The population of zip code 83440 is 50,669 with a median age of 21.3.
Is 83440 in Rexburg, Idaho?
Yes, zip code 83440 is in Rexburg, Madison County, Idaho. The area code is 208.
Frequently Asked Questions
What city is zip code 83440 in?
Zip code 83440 is in Rexburg, Idaho. It is part of Madison County and uses the Mountain (MST/MDT) timezone.
What is zip code 83440?
Zip code 83440 is a U.S. postal code in Rexburg, Idaho (Madison County). It has a population of 50,669 and covers 170.4 square miles.
What is the population of zip code 83440?
The population of zip code 83440 (Rexburg, ID) is 50,669 with a median age of 21.3. There are approximately 13,845 housing units in this area.
What is the median income in zip code 83440?
The median household income in zip code 83440 (Rexburg, ID) is $57,701 per year. The cost of living index is 99 (100 = national average).
What is the average home price in zip code 83440?
The median home value in zip code 83440 (Rexburg, ID) is $372,800. The cost of living index is 99 compared to the national average of 100.
What county is zip code 83440 in?
Zip code 83440 is located in Madison County, Idaho. The primary city is Rexburg.
What is the area code for zip code 83440?
Zip code 83440 in Rexburg, ID uses area code 208. It is located in the Mountain (MST/MDT) timezone.
Is zip code 83440 a good place to live?
Zip code 83440 (Rexburg, ID) has a cost of living index of 99 (100 = national average), a median household income of $57,701, and median home values of $372,800. The median age is 21.3. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 83440?
The cost of living index for zip code 83440 (Rexburg, ID) is 99, where 100 represents the national average. This area is below the national average. Median home value: $372,800.
What schools serve zip code 83440?
Zip code 83440 in Rexburg, Idaho is served by the local school district of Madison County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.