St. Anthony is a city in Fremont County, Idaho, home to about 3,911 people across 1.6 square miles. Its ZIP code is 83445.
Homes sold for a median of $190 per square foot in the three months ending August 2026, a seller’s market.
Mostly St. Anthony; also Parker
Each card is that ZIP code’s whole market, including any part outside St. Anthony. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up St. Anthony’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Salt Lake City International Airport (SLC)220 miles away |
|---|---|
| Closer regional airport | Idaho Falls Regional Airport (IDA)36 miles away |
| Nearest city of 250,000+ | Denver, CO455 miles away |
| Nearest city of 1 million+ | Phoenix, AZ718 miles away |
Straight-line distances from the center of St. Anthony; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
St. Anthony had 3,606 residents in the 2020 census, up 8% since 2000.
It’s the 41st largest of 232 towns in Idaho by population.
Fremont County grew from 12,821 residents in 1900 to 13,388 in 2020.
Fremont County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 12°F. About 14.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Saint Anthony, ID weather station (about a mile away).
2,147 jobs at 395 businesses in Fremont County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
38 doctors and other health care providers list an office in St. Anthony.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Dentists | 7 |
| Nurse practitioners and physician assistants | 10 |
| Mental health providers | 15 |
| Physical and occupational therapists | 2 |
| Pharmacies | 4 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Grocery stores
Pharmacies (1 nearby)
Libraries
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Fremont County Joint District, Idaho Department of Juvenile Corrections. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Henrys Fork ElementarySt Anthony | Pre-K–5 | 569 | Public | 1.0 mi |
| Parker-Egin Elementary SchoolSt Anthony | Pre-K–5 | 95 | Public | 2.7 mi |
| Teton Elementary SchoolSt Anthony | Pre-K–5 | 124 | Public | 5.4 mi |
| Five-County Detention CenterSt Anthony | 5–12 | 18 | Alternative Education | 1.3 mi |
| Jcc - St AnthonySt Anthony | 6–12 | — | Alternative Education | 0.7 mi |
| South Fremont Jr. HighSt Anthony | 6–8 | 367 | Public | 1.1 mi |
| South Fremont High SchoolSt Anthony | 9–12 | 462 | Public | 1.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Parker.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.