Legal research for Idaho law firms - Boise, Coeur d'Alene and Idaho Falls
By LegiMatch Research Team · Published October 16, 2026 · 2 min read
Short answer: in Idaho, most appeals go to the Idaho Court of Appeals, under the Idaho Supreme Court. The state has one federal district within the Ninth Circuit, and it applies modified comparative fault (50% bar) in negligence cases.
Idaho's courts
| Court | Role |
|---|---|
| Idaho Supreme Court | Highest court; binds every Idaho court |
| Idaho Court of Appeals | Cases assigned to it by the Supreme Court |
| Trial courts | District courts, with magistrate divisions |
What to know before you research
All appeals are filed with the Idaho Supreme Court, which keeps some and assigns others to the Court of Appeals. Research both courts' decisions, and check whether the Supreme Court later reviewed a Court of Appeals decision.
Negligence rule
Idaho applies modified comparative fault (50% bar): a plaintiff recovers, reduced by their share of fault, only if their fault is less than the defendants'.
Federal courts
| District | Main cities |
|---|---|
| District of Idaho | Boise, Coeur d'Alene, Pocatello, Moscow |
Appeals go to the Ninth Circuit in San Francisco.
Citations and statutes
Decisions are reported in P.3d. For statutes, use the Idaho Code (legislature.idaho.gov), and check the version in force on the relevant date.
Researching a matter
- Describe the facts plainly, for example: "A Boise cyclist was hit by a pickup turning right across the bike lane; the driver says the cyclist was riding too fast at dusk without a light."
- Search Idaho decisions first, then Ninth Circuit decisions if you're in federal court.
- Read the law at issue - here, Idaho Code § 6-801 on comparative negligence - and check treatment before relying on any case.
To find decisions with facts like yours, LegiMatch ranks up to 100 similar cases per matter and shows why each one matched - facts, issues, statutes, jurisdiction and recency. Every result links to the court's text. It doesn't give legal advice.
More states: courts in every major US city.
Frequently asked questions
How do cases reach the Idaho Court of Appeals?
All appeals are filed with the Idaho Supreme Court, which assigns some of them to the Court of Appeals.
What negligence rule does Idaho use?
Modified comparative negligence: a plaintiff recovers only if their negligence isn't as great as the defendant's, with damages reduced.
Which federal circuit covers Idaho?
The Ninth Circuit, which sits in San Francisco.
Sources
- Idaho court system and legislature websites
- United States Courts, court locator (uscourts.gov)
This article is general information about legal research, not legal advice. Verify every authority before relying on it.
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