---
title: "Matthew Haynes | KnowJudges"
canonical: "https://knowjudges.com/kyj/judge/matthew-haynes-id-trial"
page_type: "judge_profile"
updated: "2026-10-07"
---

# Matthew Haynes

Idaho Magistrate Division, Judicial District 4 · Magistrate Judge

## Profile

- Court: Idaho Magistrate Division, Judicial District 4
- State: Idaho
- Role: Magistrate Judge
- Service status: active
- Last verified: 2026-07-27

## Summary

Official statewide and applicable court procedural guidance applies to this judge.

## Biography

### Professional career

- Appointed by the Fourth Judicial District Magistrates Commission on November 17, 2023 to fill a vacancy created by Judge Annie McDevitt’s appointment to the district bench
- Ada County prosecutor from March 2015
- Law clerk to Judge David W. Gratton, Idaho Court of Appeals
- The first Ada County Prosecutor to be appointed to the bench in this role

### Education

- in Business Administration — California State University, Fresno — magna cum laude — B.S.
- Gonzaga University School of Law — J.D.

### Additional information

- Magistrate Judge in Idaho’s Fourth Judicial District, serving in Ada County and handling the family law calendar since November 2023
- Appointed magistrate, Ada County, November 17, 2023, succeeding Annie McDevitt
- Began his tenure on November 21, 2023 As a Magistrate Judge in Ada County, he presides over the family law calendar in the Idaho 4th Judicial District, which covers Ada, Boise, Elmore, and Valley counties
- Judge David W. Gratton, Idaho Court of Appeals Admitted to the Idaho State Bar in 2013 Joined Ada County Prosecutor’s Office in 2015, most recently on the district court felony trial team Served over eight years on the Board of Directors for the Idaho Peace Officers’ Memorial
- His appointment followed a competitive recruitment process with interviews of top candidates

## Before you appear

- Read the judge-specific standing order first when one is listed.
- Check the docket and case orders for requirements that supersede broader guidance.
- Confirm current remote-access and courtroom technology arrangements before the proceeding.

## Courtroom Rules

### electronic exhibit format

Scope: statewide

Idaho's statewide electronic-filing rule generally requires text-searchable PDF or PDF/A submissions and a 50 MB per-document limit; scanned-image attachments and exhibits may use standard PDF and are not rejected for the usual text-searchability format requirement.

Evidence excerpt: A document ... submitted electronically to the court must be in the form of a text-searchable Portable Document Format (PDF) or a text-searchable Portable Document Format/A (PDF/A) file ... and not exceed 50 megabytes. A document that is an attachment or exhibit ... may be in standard PDF format and need not be text searchable.

[Idaho Rules for Electronic Filing and Service, Rule 6](https://isc.idaho.gov/rules-procedure/irefs)
Source checked: 2026-07-27


## Sources

- [Official profile](https://isc.idaho.gov/about-the-courts/judicial-directory)
- [Official roster](https://isc.idaho.gov/about-the-courts/judicial-directory)
- [Idaho Supreme Court official judicial roster](https://isc.idaho.gov/about-the-courts/judicial-directory)
- [Idaho Rules for Electronic Filing and Service, Rule 6](https://isc.idaho.gov/rules-procedure/irefs)
- [biography](https://adacounty.id.gov/judicial-court/wp-content/uploads/sites/60/Amended-Press-Release-New-Judge-in-Ada-County-11-21-23.pdf)
- [current_membership](https://isc.idaho.gov/about-the-courts/judicial-directory)

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## Published courtroom rules

### Shared court rules

- [Idaho Rules for Electronic Filing and Service, Rule 6](https://knowjudges.com/courtroom-rules/national-shared-set-0c38e11cda2478da65cd7ff5) — Scope is limited to the court class in the source claim.  Shared court context only; case-type restrictions, exceptions, later amendments and case orders apply. This is not a personal preference or a complete rules inventory. [Official source](https://isc.idaho.gov/rules-procedure/irefs). Collected 2026-07-27.