County · code 16077
Power CountyIdaho
Power County is in Idaho and was created in 1913, with its seat in American Falls.
- Founded1913
- County seatAmerican Falls
- Named forAmerican Falls Dam, Idaho
- Land area1,404 sq mi + 38 sq mi water
- Population7,878 2020 Census
- Parcels mapped7,570 checked 16 October 2026
Where it is
Power on the map of Idaho
Idaho has 44 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1913 from Bingham County, Blaine County, Cassia County and Oneida County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Power County was created on January 30, 1913, from parts of Bingham, Blaine, Cassia, and Oneida Counties. The county was named after American Falls Dam. Power gained territory from Oneida County in a vote approved on November 7, 1916, and exchanged land with Bannock County on March 15, 1927.
- 1913Power County created Power created from Bingham, Blaine, Cassia, and Oneida. · Id. Laws 1913, 12th sess., ch. 6/pp. 30-45
- 1916Gained territory Power gained from Oneida. Act approved 15 March 1915, became effective through a vote in the general election of 7 November 1916. · Id. Laws 1915, 13th sess., ch. 132/pp. 287-289; Id. Code Ann. (1996), vol. 6, ch. 1, sec. 31-142 "Power Co."/p. 54
- 1927Exchanged territory Power exchanged with Bannock. · Id. Laws 1927, 19th sess., ch. 256/pp. 431-439
Land and parcels
What the maps cover in Power
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 7,570 parcels from Idaho Department of Water Resources. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 16 October 2026 -
Address points Good enough
One point per address, 3,231 in all.
checked 13 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Power by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Power County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Power County.
See your own lot on these maps
Open Power County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Power County
- When was Power County founded?
- Power County was founded in 1913, formed from Bingham County, Blaine County, Cassia County and Oneida County, and named after American Falls Dam, Idaho.
- What is the county seat of Power County?
- The county seat of Power County is American Falls.
- Is there an online parcel map for Power County?
- Yes. Idaho Department of Water Resources publishes a parcel map of 7,570 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Power County's boundary or name changed?
- Power County was created in 1913 from Bingham County, Blaine County, Cassia County and Oneida County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Bannock County and Oneida County.
- Is my lot in a flood zone?
- We do not have flood maps for Power County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby