BlockBefore

Irwin, Idaho

16 topographic sheets cover this place, the earliest surveyed in 1932 and the latest in 1986. It stands in the Swan Valley census division. It lies in ZIP code area 83449. It lies near Flatiron. The Survey maps it on the Swan Valley quadrangle. 259 people lived here at the 2020 count. It stands 5,325 feet above sea level.

Irwin within Bonneville County

Population over time

2 figures

Irwin grew from 219 to 259 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.

YearPeople Change
2010219
2020259+40 (+18%)

Topographic sheets covering this place

8 surveys from 16 printed sheets

Matched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.

Fires near this place

39 since 1992

Regional context, not property-specific evidence. The federal wildfire occurrence database lists 39 fires within 5 miles of Irwin between 1992 and 2015, burning about 292 acres in total. 28 started naturally. 3 were recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.

Reported cause Fires
Natural28
Recreation and ceremony3
Debris and open burning3
Arson/incendiarism3
Power generation/transmission/distribution1
Missing data/not specified/undetermined1

The most recent of them, most recent first, with the day each was reported and the service that recorded it.

DateCause SizeReported by Name on the report
17 September 2000Natural1.0 acresCaribou-Targhee National ForestRIVER
12 September 2000Naturalunder an acreCaribou-Targhee National ForestROCKY RIDGE
10 September 1994Natural1.0 acresCaribou-Targhee National Forestnot named
7 August 2006Naturalunder an acreCaribou-Targhee National ForestINDIAN
30 August 2002Naturalunder an acreCaribou-Targhee National ForestROLLER
30 August 2001Naturalunder an acreCaribou-Targhee National ForestLONG GULCH
27 August 2012Naturalunder an acreCaribou-Targhee National ForestWORK CENTER
27 August 2012Naturalunder an acreCaribou-Targhee National ForestWOODPECKER

Settlements close enough to share some of these fires:

Every fire recorded in Bonneville County

Mines and quarries near this place

10 of 16 shown

Regional context, not property-specific evidence. The federal mineral resources record lists 16 workings within 5 miles of Irwin: 11 prospects, 3 occurrences, 1 producer, 1 past producer. 1 still produces. What was taken out: Phosphorus-Phosphates, Bentonite, Geothermal, Sand and Gravel, Construction. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Where SiteCommodity StatusRecorded
Gravel PitSand and Gravel, ConstructionPast Producer
Snake River Area (Bentonite Occurrence)BentoniteOccurrenceBentonite
Unnamed Hot SpringGeothermalProducer
E. A. Rex Mining Co. Phosphate LeasePhosphorus-PhosphatesOccurrence
Long GulchPhosphorus-PhosphatesProspect
Papoose Creek Phosphate DepositPhosphorus-PhosphatesOccurrence
Unnamed ProspectPhosphorus-PhosphatesProspect
Unnamed ProspectPhosphorus-PhosphatesProspect
Unnamed ProspectPhosphorus-PhosphatesProspect
Unnamed ProspectPhosphorus-PhosphatesProspect

Every working recorded in Bonneville County

Storms near this place

3 since 2022

Regional context, not property-specific evidence. The National Weather Service names Irwin in 3 storm reports between 2022 and 2025: 2 hail, 1 thunderstorm wind. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.

WhenEvent Place namedHarm What the report says
May 2025Thunderstorm WindIrwin-Wind gusts caused power outages in the Irwin area.
August 2022HailIrwin-Quarter sized hail photographed near Irwin.
August 2022HailIrwin-Spotter reported 1 inch hail just south of Irwin.

Every storm recorded in Bonneville County

Nearest settlements

The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.

Map PlaceDistance Sheets
Swan Valley4.0 miles16
Palisades5.8 miles16
Keenan City (historical)18.6 miles16
Guyaz19.1 miles13
Herman19.8 miles15
Caribou City (historical)21.2 miles16
Dehlin21.8 miles13
Gray25.1 miles14

Elsewhere

Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.

Wikipedia article on IrwinAn encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied.
Wikidata item Q1512341The structured record the population and elevation above come from. Public domain (CC0).

Provenance

This settlement is recorded in the Geographic Names Information System as feature 397812. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.

Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.

Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.

Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.