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County · code 16003

Adams CountyIdaho

Adams County is a county in Idaho, with its seat in Council. The county was formed on March 15, 1911.

  • Founded1911
  • County seatCouncil
  • Named forJohn Adams
  • Land area1,363 sq mi + 6.7 sq mi water
  • Population4,379 2020 Census
  • Parcels mapped7,874 checked 16 October 2026
Open the free map Click any parcel in Adams County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

WashingtonGemValleyWallowa, ORBaker, ORIdaho Council Census outline · seat marked

Where it is

Adams on the map of Idaho

Idaho has 44 counties and county equivalents, each with its own records office. Shapes with a page are links.

Ada CountyBannock CountyBear Lake CountyBenewah CountyBingham CountyBlaine CountyBoise CountyBonner CountyBonneville CountyBoundary CountyButte CountyCamas CountyCanyon CountyCaribou CountyCassia CountyClark CountyClearwater CountyCuster CountyElmore CountyFranklin CountyFremont CountyGem CountyGooding CountyIdaho CountyJefferson CountyJerome CountyKootenai CountyLatah CountyLemhi CountyLewis CountyLincoln CountyMadison CountyMinidoka CountyNez Perce CountyOneida CountyOwyhee CountyPayette CountyPower CountyShoshone CountyTeton CountyTwin Falls CountyValley CountyWashington CountyAdams County Adams
Counties of Idaho · Adams highlighted

History

Formed in 1911 from Washington County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Adams County was created from Washington County in 1911 and named after John Adams.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1911
    Adams County created Adams created from Washington.
    from Washington
    · Id. Laws 1911, 11th sess., ch. 31/pp. 67-72

Land and parcels

What the maps cover in Adams

Who publishes each layer, how good it is, and when we last checked.

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

Adams by the Census

Population
4,379 2020 Census count
Housing units
2,642 2020 Census count
Land area
1,363 square miles
Water area
6.7 square miles
People per sq mi
3 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Zoning and code

County government

See your own lot on these maps

Open Adams 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.

Open the free map no sign-in Pro early access

Questions

Common questions about Adams County

When was Adams County founded?
Adams County was founded in 1911, formed from Washington County, and named after John Adams.
What is the county seat of Adams County?
The county seat of Adams County is Council.
Is there an online parcel map for Adams County?
Yes. Idaho Department of Water Resources publishes a parcel map of 7,874 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Adams County's boundary or name changed?
Adams County was created in 1911 from Washington County. The Atlas of Historical County Boundaries records no boundary change since.
Is my lot in a flood zone?
We do not have flood maps for Adams County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door