COUNTY
Madison County
Idaho · 55,172 residents (2025 est.) · 469 sq mi
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Part of the Rexburg micropolitan area
Notable rankings
#1Youngest by median ageof 3,14421.4The short version
With 54,618 people, Madison County is a county in Idaho. The median age is 21.4, younger than the US median of 38.9. Since 2000 the county has more than doubled, up 27,151 people. People stay put here: 62% were in the same home a year ago. Owners hold 40% of the housing stock. 24.5% of locals live below the federal poverty line.
At a glance
Lower income
below the US median
US median: $82,259
Younger
median age 21.4
US median: 38.9
More educated
42% hold a bachelor's degree
US average: 36%
Less affordable
home values up 129%, inflation adjusted
US median home: $376,019
Section 01
Population & growth
54,618
+99%since 2000
from 27,467 in 2000
55,172 in 2025 (Census Bureau estimate)
1990 – 2025
Land area
469 sq mi
Population, 1990 – 2024
202455K
Age distribution, 2024
Under 56.8%(3,711)
5 to 94.7%(2,580)
10 to 145%(2,713)
15 to 1926.3%(14,384)
20 to 2423.5%(12,813)
25 to 3413.7%(7,489)
35 to 445.6%(3,062)
45 to 545%(2,728)
55 to 644%(2,193)
65 to 743.2%(1,728)
75 to 841.7%(953)
85 and over0.5%(264)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$60,160
+1%inflation adjusted, since 2000
from $32,607 in 2000
US average: $82,259
1990 – 2024
Households earning $100K+
38.4%
+18.7 ptssince 2009
from 19.7% in 2009
US average: 53.3%
Workforce by industry, 2024
Information13.5%
Retail trade5.5%
Wholesale trade5.5%
Other services2.9%
Finance & insurance2.1%
Agriculture, forestry, fishing2%
Transportation & warehousing2%
Construction1.9%
Professional, scientific, technical1.8%
Public administration1.6%
Arts, entertainment, food1.4%
Education & health services0.3%
Manufacturing0.1%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03
Housing
$414,800
+129%inflation adjusted, since 2000
from $99,300 in 2000
US average: $376,019
1990 – 2024
6.9
+50%since 2009
from 4.6 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
92
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity
2000
White, non-Hispanic94.1%(25,856)
Black0.2%(56)
Hispanic / Latino3.9%(1,078)
Asian0.6%(153)
Other0%
2024
White, non-Hispanic83.5%(45,595)
Black1%(542)
Hispanic / Latino9.8%(5,369)
Asian1.5%(816)
Other4.2%(2,296)
36
+91%since 2009
from 19 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
16
−28%since 2020
from 22 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins
Detailed origins & ancestry
Hispanic origin
Mexican7%(3,797)
South American1%(562)
Central American0.5%(268)
Puerto Rican0.3%(165)
Salvadoran0.3%(149)
Spaniard0.2%(129)
Ecuadorian0.2%(110)
Colombian0.2%(109)
Argentine0.2%(94)
Cuban0.2%(88)
Guatemalan0.2%(86)
Chilean0.1%(65)
+ 6 more hispanic origin groups with data
Asian origin
Chinese0.4%(229)
Korean0.3%(164)
Hmong0.2%(131)
Taiwanese0.2%(126)
Filipino0.1%(79)
Japanese0.1%(34)
Vietnamese0.1%(31)
Nepalese0%(22)
Ancestry
English33.9%(18,496)
German13.2%(7,212)
American6.5%(3,549)
Scottish5.1%(2,775)
Danish4.5%(2,460)
Irish4.3%(2,332)
Swedish3.1%(1,703)
Italian2.5%(1,351)
Welsh2.3%(1,283)
French2%(1,114)
Norwegian1.8%(996)
British1.3%(737)
+ 29 more ancestry groups with data
Dutch1.1%(628)
Polish0.9%(496)
Swiss0.8%(443)
Subsaharan African0.6%(336)
Czech0.5%(296)
Scotch-Irish0.3%(172)
Brazilian0.3%(170)
Russian0.3%(152)
Portuguese0.2%(120)
Canadian0.2%(117)
Slovak0.2%(109)
West Indian0.2%(92)
Finnish0.1%(79)
Austrian0.1%(71)
Haitian0.1%(71)
Ghanaian0.1%(70)
Hungarian0.1%(68)
Arab0.1%(49)
Lebanese0.1%(49)
Belgian0.1%(41)
Armenian0.1%(40)
French Canadian0.1%(32)
Lithuanian0.1%(28)
Ukrainian0%(27)
Nigerian0%(23)
Jamaican0%(21)
Romanian0%(20)
Greek0%(8)
Latvian0%(4)
Section 05
Education
High school or higher
97.3%
+8.8 ptssince 2000
from 88.5% in 2000
US average: 89.6%
Section 06
Commute & transportation
Section 07
Work & employment
Women 20-64 in the labor force
67.6%
+0.2 ptssince 2020
from 67.4% in 2020
US average: 74.6%
Section 08
People & community
Computer in household
98.8%
+0.7 ptssince 2020
from 98.1% in 2020
US average: 95.5%
Marital status
Men 15+
Never married49.5%(9,866)
Married47.8%(9,528)
Widowed0.7%(136)
Divorced2.1%(418)
Women 15+
Never married56.1%(14,404)
Married38.9%(9,993)
Widowed2.3%(598)
Divorced2.6%(671)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage
Direct-purchase
18.3%
−3.7 ptssince 2020
from 22.0% in 2020
US average: 13.8%
VA health care
0.6%
Unchangedsince 2020
from 0.6% in 2020
US average: 2.2%
Any private
76.0%
+0.6 ptssince 2020
from 75.4% in 2020
US average: 67.1%
Any public
26.2%
−0.9 ptssince 2020
from 27.1% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)33.2%(224)
Gulf War (1990s)25.2%(170)
Vietnam era23.4%(158)
Korean War6.8%(46)
World War II0%(0)
Share of the 675 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper
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Compare Madison County to nearby counties
MADISON COUNTY VS
Teton County
Income$99,805+66%
Home value$690,500+66%
Population13,254−76%
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MADISON COUNTY VS
Bonneville County
Income$79,068+31%
Home value$368,800−11%
Population135,771+146%
SEE FULL COMPARISON →
MADISON COUNTY VS
Fremont County
Income$72,683+21%
Home value$314,200−24%
Population14,208−74%
SEE FULL COMPARISON →
MADISON COUNTY VS
Jefferson County
Income$86,679+44%
Home value$408,400−2%
Population35,297−36%
SEE FULL COMPARISON →
Frequently asked
How many people live in Madison County, Idaho?
Madison County, Idaho has about 54,618 residents according to the 2024 American Community Survey.
What is the median household income in Madison County, Idaho?
The typical household in Madison County, Idaho earns about $60,160 a year. Half of households make more than that, and half make less.
Is Madison County, Idaho expensive?
In Madison County, Idaho, the median home is worth about $414,800, and the typical rent is about $1,014 a month.
How educated are people in Madison County, Idaho?
About 41.8% of adults age 25 and over in Madison County, Idaho hold a bachelor's degree or higher.
What is the poverty rate in Madison County, Idaho?
About 24.5% of people in Madison County, Idaho live below the federal poverty line.
Has Madison County, Idaho grown since 1990?
Yes, Madison County, Idaho has grown since 1990. The population has added about 30,944 residents, a change of about 131 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024