City vs city
Firth vs Shelley, Idaho
Shelley has about 9.7 times as many people as Firth. They are about 6 miles apart in a straight line.
The basics
Population
Source: U.S. Census Bureau population estimates (Vintage 2024) · July 1, 2024 estimate
542
5,262
County
Source: U.S. Census Bureau and USGS Geographic Names Information System · Checked Oct 3, 2026
Bingham County
Bingham County
Elevation
Source: USGS Geographic Names Information System · Checked Oct 3, 2026
4,600 ft
4,600 ft
Distance to Boise (straight line)
Source: Straight line between the two town centers (USGS and Census coordinates) · Checked Oct 3, 2026
203 mi
205 mi
Price level (U.S. average = 100)
Source: U.S. Bureau of Economic Analysis regional price parities, all items, for the metro area (via FRED) · 2024 data, released Feb 19, 2026 · Towns outside a metro area use Idaho's statewide figure.
95.5
95.5
Public schools
Source: NCES Common Core of Data, operating public schools · 2024-25 school year
3
7
Outdoors
Trails within 15 miles
Source: Trails listed on Treasure Idaho (OpenStreetMap and public land agencies) · Checked Oct 2, 2026
6
11
Things to do within 15 miles
Source: Things to do listed on Treasure Idaho (OpenStreetMap and USGS) · Checked Oct 2, 2026
11
13
Allergies, in a typical year
Spring tree pollen
Source: National Allergy Bureau daily pollen counts, CDC release 2003 to 2024 (Boise, Twin Falls, Coeur d'Alene stations) · Typical year; how it is rated is on each city page · Firth uses the Twin Falls station, 126 miles away. Shelley uses the Twin Falls station, 131 miles away.
Moderate
Moderate
Early-summer grass pollen
Source: The Allergy Group (Boise) grass counts; NAB station reports for North Idaho · Typical year; how it is rated is on each city page · Firth uses the Twin Falls station, 126 miles away. Shelley uses the Twin Falls station, 131 miles away.
High
High
Fall weed and sagebrush pollen
Source: National Allergy Bureau daily pollen counts, CDC release 2003 to 2024 (Boise, Twin Falls, Coeur d'Alene stations) · Typical year; how it is rated is on each city page · Firth uses the Twin Falls station, 126 miles away. Shelley uses the Twin Falls station, 131 miles away.
High
High
Wildfire smoke (days a year over AQI 100)
Source: EPA AirData: annual AQI by county · 2021 to 2025 average · Firth has no air monitor in its county and uses Bonneville County. Shelley has no air monitor in its county and uses Bonneville County.
Low, 2
Low, 2
Only figures both towns have are shown. Counts of communities, builders, jobs, businesses and stays are what Treasure Idaho lists today, not every one in town. Allergy ratings are typical, general guidance, not medical advice; each city page shows how its ratings were worked out.