Island Park is a city in Fremont County, Idaho, home to about 170 people across 6.1 square miles. Its ZIP codes are 83429 and 83433.
Homes sold for a median of $359 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Island Park
Mostly Island Park
Each card is that ZIP code’s whole market, including any part outside Island Park. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Island Park’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Boise Air Terminal/Gowen Field (BOI)248 miles away |
|---|---|
| Closer regional airport | Yellowstone Airport (WYS)22 miles away |
| Nearest city of 250,000+ | Denver, CO464 miles away |
| Nearest city of 1 million+ | Phoenix, AZ751 miles away |
Straight-line distances from the center of Island Park; 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.
Island Park had 193 residents in the 2020 census, down 10% since 2000.
It’s the 198th 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 77°F in summer, and winter lows average 6°F. About 28.8 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Island Park, 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).
1 doctors and other health care providers list an office in Island Park’s ZIP codes.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|
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.
Public schools here are run by Island Park Charter School Inc.. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Island Park Charter SchoolIsland Park | K–5 | 28 | Charter | 4.7 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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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.