Fremont County, Idaho
Fremont County, Idaho, has 14,208 residents (July 2025 estimate). Its county seat is St. Anthony. It uses Mountain Time and covers 1,864 sq mi (4,828 km²) of land.
- Resident population, July 2025
- 14,208
- Land area
- 1,864 sq mi (4,828 km²)
- County seat or government
- St. Anthony
- Time zone
- Mountain TimeUTC-07:00 in January; UTC-06:00 in July
- Median household income
- $72,683 ± $5,715
- Median home value
- $314,200 ± $22,058
- Median rent, with utilities
- $864 ± $129
- Homes lived in by their owners
- 82.6% ± 3.1 points
- County type
- County
- Metro or micro area
- Rexburg, ID micro areaOutlying county
- Water area
- 32.2 sq mi (83.4 km²)
- State
- Idaho
- County code (FIPS)
- 16043
- Coordinates (central point)
- 44.218091, -111.484429
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 Fremont County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Mountain TimeAmerica/Boise | UTC-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
- 8344051,421 people
- 834457,975 people
- 834483,365 people
- 834202,580 people
- 83451993 people
- 83436778 people
- 83429628 people
- 83425622 people
- 83438327 people
- 83421220 people
- 8343336 people
11 ZIP Code areas overlap Fremont 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
Fremont County government website ↗ is the next stop for county offices, tax, voting, jury and records information. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Fremont County, largest first
- Fremont County Joint School District 21512,641 people
- 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.
- St. Anthony, Idaho (city)3,911 people
- Ashton, Idaho (city)1,417 people
- Teton, Idaho (city)877 people
- Parker, Idaho (city)607 people
- Newdale, Idaho (city)525 people
- Island Park, Idaho (city)170 people
- Drummond, Idaho (city)3 people
- Warm River, Idaho (city)0 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Madison County, Idaho31 mi south
- Teton County, Idaho34 mi southeast
- Clark County, Idaho43 mi west
- Jefferson County, Idaho51 mi southwest
- Teton County, Wyoming54 mi east
- Madison County, Montana79 mi north
- Gallatin County, Montana91 mi north
- Beaverhead County, Montana94 mi northwest
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.