ZIP code · Rexburg · Idaho · United States

ZIP code 83440 — Rexburg

ZIP code 83440 serves Rexburg, Idaho.

Postal code
83440
Single source Value from one source, not cross-checked.
City
Rexburg
County
Madison FIPS 16065
State
Idaho
Country
United States
Coordinates
43.8100, -111.7890 — precision precise (locality)
View on OpenStreetMap
Population
50,669 (ZCTA, ACS 5-year)
Population density
279 / sq mi
Land area
181.7 sq mi (470.5 km²) (ZCTA, ACS 5-year)
Median household income
$57,701
Per-capita income
$22,680
Median age
21.3
Households
11,929
Housing units
13,845
Median home value
$372,800
Median gross rent
$959 / month
Congressional district
ID-2 (119th Congress)
USDA hardiness zone
5a (-20 to -15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Boise (UTC−7 / UTC−6 DST)
Area codes
208, 986 (from the nearest rate centre)
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 85°F), coldest Jan (avg low 14°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F303446566675858474584230
Avg low °F141726334147525043332415
Precip in1.20.80.91.21.81.50.60.71.01.10.71.1

NOAA 1991–2020 climate normals from the nearest station: REXBURG BYU IDAHO (0.1 mi) · NOAA NCEI

Places in ZIP 83440

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page