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Where am ILOCATED

Madison County, Idaho

Madison County, Idaho, has 55,172 residents (July 2025 estimate). Its county seat is Rexburg. It uses Mountain Time and covers 469 sq mi (1,215 km²) of land.

Boise CityMeridian
Madison County in Idaho
RexburgSugar City
Madison County and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Resident population, July 2025
55,172
Land area
469 sq mi (1,215 km²)
County seat or government
Rexburg
Time zone
Mountain TimeUTC-07:00 in January; UTC-06:00 in July
Median household income
$60,160 ± $6,493
Median home value
$414,800 ± $21,710
Median rent, with utilities
$1,014 ± $48
Homes lived in by their owners
40.2% ± 2.6 points
County type
County
Metro or micro area
Rexburg, ID micro areaCentral county
Water area
4.05 sq mi (10.5 km²)
State
Idaho
County code (FIPS)
16065
Coordinates (central point)
43.788614, -111.656993
Open this point in the location finder

These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.

Time zones in Madison County

Time zoneLocal time and UTC offsetNext clock change
Mountain TimeAmerica/BoiseUTC-07:00 in January; UTC-06:00 in July. Enable JavaScript for the live clock.Enable JavaScript for upcoming changes.

Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.

ZIP Code areas, largest first

  1. 8344051,421 people
  2. 834457,975 people
  3. 834483,365 people
  4. 834341,816 people
  5. 834431,364 people
  6. 83451993 people
  7. 83436778 people
  8. 8346056 people

8 ZIP Code areas overlap Madison County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.

Official county information

We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.

School districts in Madison County, largest first

  1. Madison School District 32149,923 people
  2. Jefferson County Joint School District 25128,220 people
  3. Fremont County Joint School District 21512,641 people
  4. Sugar-Salem Joint School District 3225,997 people

Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.

Cities, towns and communities, largest first

These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.

  1. Rexburg, Idaho (city)40,543 people
  2. Sugar City, Idaho (city)2,122 people

Bordering areas, nearest first

Distances are straight lines between map points.

  1. Teton County, Idaho22 mi east
  2. Bonneville County, Idaho27 mi south
  3. Fremont County, Idaho31 mi north
  4. Jefferson County, Idaho33 mi west

Before using this answer on a form

Use a precise point for address-level questions. A device accuracy circle can cross a boundary; confirm tax, voting or jury details with the responsible office.

Find the county where you are now, check its ZIP area, or check the time zone where you are.

See this county on Census.gov ↗

Areas that only touch the edge

These areas meet the boundary only along a sliver. Most addresses here are not in them; for an address near the line, check with the county.