Residential delivery area · Idaho
ZIP Code 83429: Island Park, ID
ZIP code 83429 uses the postal name Island Park, Idaho and lies entirely in Fremont County (Census 2020 ZIP-county file). About 630 people live there (Census Bureau, ACS 2020-2024). Median household income is $78,565 (Census Bureau, ACS 2020-2024). By Census place, 1% of its land lies in Island Park; 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Island Park · its only residential ZIP
- County
- Fremont County
- Census places
- Island Park
- Micro area
- Rexburg, ID
- House district
- ID-2 119th Congress
- State
- Idaho
- Time zone
- Mountain
- Land area
- 494.6 sq mi · 1 person per sq mi
Where is ZIP code 83429?
83429 centers on 44.482°, -111.375° and covers 494.6 square miles of land plus 23.9 of water. It borders 6 ZIP codes: 83433, 59758, 83420, 59720, 83445, 59739.
The map draws ZIP code areas only. For the streets inside 83429, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 83429 compare with the rest of Fremont County?
| Measure | 83429 | In Fremont County | In ID |
|---|---|---|---|
| People (ACS 2020-2024) | 628 | 7th of 11 | 187th of 279 |
| Median household income | $79k | not ranked | not ranked |
| Median home value | $502k | not ranked | not ranked |
83429's income and home value are not ranked: it has fewer than 1,000 residents (628). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 5% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 83429?
The 2020 Census counted 980 people in 83429; the ACS, which samples households over 2020-2024, estimates 628. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 628±186 (90% margin)
- 2020 Census count
- 980
- Households
- 325
- Median age
- 68.2
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 83429?
Of the 628 people the ACS estimates in 83429, 7.8% are under 18 and 53.5% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.2%).
- Under 187.8%
- 18 to 6438.7%
- 65 and older53.5%
- White, not Hispanic92.2%
- Other or two or more6.2%
- Hispanic or Latino1.6%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 83429 earn?
Median household income is $78,565 (ACS 2020-2024).
- Median household income
- $78,565±$12,758
- Income per person
- $42,651
- Below the poverty line
- 5.3%
- Unemployed (of the labor force)
- 3.4%
- Adults 25+ with a bachelor's degree
- 30.2%
- Adjusted gross income per tax return, 2022
- $94,738550 returns; wages 37% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 83429?
FHFA's house price index for 83429, built from repeat sales and appraisals of the same homes, rose 156% from 2015 to 2025 and rose 61% from 2020 to 2025, and moved −0.7% in 2025.
- Median home value (owners' estimate)
- $502,200
- Median gross rent
- –
- Homes owned by their occupants
- 97.5%
- Housing units
- 3,405
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 83429?
71 business establishments had a location in this ZIP code in 2023, 21 more than in 2018; the most are in accommodation and food services (ZIP Code Business Patterns).
- Accommodation and food services23
- Construction10
- Retail trade9
- Real estate and rental and leasing6
- Other services (except public administration)6
- Administrative and support and waste management and remediation services4
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 83429?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 83433 | Macks Inn | 36 | $94k | 2.9 mi |
| 59758 | West Yellowstone, MT | 2,180 | $66k | 23.8 mi |
| 83420 | Ashton | 2,580 | $69k | 29.3 mi |
| 59720 | Cameron, MT | 220 | $67k | 33.3 mi |
| 83445 | Saint Anthony | 7,975 | $68k | 35.7 mi |
| 59739 | Lima, MT | 299 | $54k | 42.4 mi |
| 83421 | Chester | 220 | – | 34.2 mi (near) |
| 82190 | Yellowstone National Park, WY | 686 | $65k | 35.9 mi (near) |
| 83438 | Parker | 327 | $146k | 40.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.