ZIP Code Tabulation Area · Idaho

ZIP Code 83440: Madison County, ID

ZIP Code 83440 (Madison County, Idaho) has an estimated 51,421 residents in 12,426 households. The median household income is $58,159, the median home value is $419,300 and the median gross rent is $1,000/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

51,421

Margin of error ±645

Median household income

$58,159

Margin of error ±$6,248

Median home value

$419,300

Margin of error ±$21,407

Median gross rent

$1,000/mo

Margin of error ±$43

Median age

21.3 yrs

Margin of error ±0.3 yrs

Mean travel time to work

16.2 min

Margin of error ±1.7 min

How ZIP 83440 compares with Idaho and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 8344021.3 yrsIdaho37.3 yrsUnited States38.9 yrs

Median household income

ZIP 83440$58,159Idaho$77,800United States$80,734

Per capita income

ZIP 83440$23,661Idaho$38,952United States$44,673

Poverty rate

ZIP 8344025.8%Idaho10.6%United States12.5%

Unemployment rate

ZIP 834407.8%Idaho3.7%United States5.2%

Bachelor's degree or higher

ZIP 8344040.9%Idaho31.8%United States35.7%

Median home value

ZIP 83440$419,300Idaho$418,600United States$332,700

Median gross rent

ZIP 83440$1,000/moIdaho$1,238/moUnited States$1,413/mo

Owner-occupied homes

ZIP 8344038.5%Idaho72.1%United States65.2%

Mean travel time to work

ZIP 8344016.2 minIdaho21.6 minUnited States26.4 min

Worked from home

ZIP 8344012.5%Idaho13.3%United States15.1%

All figures for ZIP 83440

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 83440 — ACS 2020–2024 5-year estimates
Measure	ZIP 83440	Margin of error	Idaho	United States
Total population	51,421	±645	1,934,262	334,922,499
Median age	21.3 yrs	±0.3 yrs	37.3 yrs	38.9 yrs
Households	12,426	±418	713,005	129,227,496
Median household income	$58,159	±$6,248	$77,800	$80,734
Per capita income	$23,661	±$3,903	$38,952	$44,673
Poverty rate	25.8%	±3.1 pts	10.6%	12.5%
Unemployment rate	7.8%	±2.3 pts	3.7%	5.2%
Bachelor's degree or higher	40.9%	±3.3 pts	31.8%	35.7%
Median home value	$419,300	±$21,407	$418,600	$332,700
Median gross rent	$1,000/mo	±$43	$1,238/mo	$1,413/mo
Owner-occupied homes	38.5%	±2.6 pts	72.1%	65.2%
Mean travel time to work	16.2 min	±1.7 min	21.6 min	26.4 min
Worked from home	12.5%	±3.3 pts	13.3%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 83440
Group	ZIP 83440	Idaho	United States
White alone, not Hispanic or Latino	83.5%	78.6%	57.4%
Black or African American alone, not Hispanic or Latino	1.0%	0.7%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.2%	0.7%	0.5%
Asian alone, not Hispanic or Latino	1.6%	1.3%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.2%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	0.9%	0.6%	0.6%
Two or more races, not Hispanic or Latino	2.9%	4.2%	4.3%
Hispanic or Latino (of any race)	9.8%	13.6%	19.3%

Where ZIP 83440 is

State: Idaho
Main county: Madison County— also overlaps Fremont County
Largest overlapping place: Rexburg (5% of the ZIP's land area)
Land area: 181.67 sq mi· about 283 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Madison County

83436 Madison County, ID 83448 Madison County, ID 83451 Madison County, ID

See every ZIP code in Idaho, or compare ZIP 83440 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.