Idaho / ID-01

Idaho District 1

39 Compact

Less compact than 37% of other congressional districts.

269th least compact of 429 nationally, 1st of 2 in Idaho.

A score describes shape, not intent. Coastlines, rivers and the Voting Rights Act can all make a district irregular. How scores work

The three measures

Polsby-Popper: 0.19at least as compact as 32% of districts on this measure
Area compared with perimeter. Low for jagged or snaking edges.
Reock: 0.56at least as compact as 70% of districts on this measure
Area compared with the smallest circle around the district, counting only land. Low for stretched shapes.
Convex hull: 0.86at least as compact as 80% of districts on this measure
Area compared with a rubber band stretched around the district, counting only land. Low for bites and tentacles.

Each measure runs from 0 to 1, where 1 is a perfect circle or a shape with no dents.

The state's edge

66% of this district's border is the state's edge: a coastline, a national border or a state line. Mapmakers don't choose those lines. A ragged one, like a coastline or a river, lowers Polsby-Popper. Reock and convex hull count only the state's own land, so water and neighboring states don't count against them. More on the state's edge

Cities and towns

The largest places with people in this district, from the 2020 Census. A place split between districts shows how many of its residents live in this one.

Meridian city111,898 of its 117,635 residents
Nampa cityall 100,200 residents
Caldwell cityall 59,996 residents
Coeur d'Alene cityall 54,628 residents
Post Falls cityall 38,485 residents
Lewiston cityall 34,203 residents
Eagle city26,879 of its 30,346 residents
Moscow cityall 25,435 residents
Kuna cityall 24,011 residents
Hayden cityall 15,570 residents

And 108 smaller places. 31% of this district's people live outside any city, town or named community. How places are counted

2024 presidential vote

Kamala Harris 26.9%, Donald Trump 73.1%

Shares of the votes for the two of them; other candidates are left out. Idaho used the same lines in 2024, so this is added up from precinct results. A precinct split between districts is divided by its House votes, so the figures are close estimates. Where the votes come from

U.S. House

Russ Fulcher, Republican

Elected November 3, 2026, takes office January 3, 2027.

Unofficial results from the Idaho Secretary of State, checked November 6, 2026. A race shows a winner once news decision desks have called it. Results become official when the state certifies them. Where this comes from

Idaho's senators

Mike Crapo, Republican
James E. Risch, RepublicanRe-elected November 3, 2026.

Senators are elected by the whole state, so district lines don't change who they are. Senators serving as of November 6, 2026. Senators elected in November 2026 take office January 3, 2027. Where this comes from

Where it sits in Idaho

Very compact (0 to 19)
Compact (20 to 39)
Middle (40 to 59)
Irregular (60 to 79)
Very irregular (80 to 100)