---
title: "Seamus P. Duffy | KnowJudges"
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page_type: "judge_profile"
updated: "2026-08-03"
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# Seamus P. Duffy

Minnesota Ninth Judicial District Court · Judge

## Profile

- Court: Minnesota Ninth Judicial District Court
- State: Minnesota
- Role: Judge
- Service status: active
- Last verified: 2026-07-26

## Summary

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

## Biography

### Professional career

- District court judge for Mahnomen County in Minnesota’s Ninth Judicial District, appointed by Governor Tim Walz on May 31, 2024, and serving until January 4, 2027
- Employment: Pennington County Attorney – 2018 – 2024
- Attorney at Duffy Law Office (2003–2018)

### Education

- University of North Dakota – School of Law — J.D. (2003)
- Bachelor of Accountancy — University of North Dakota – College of Business — 1999

### Additional information

- Expiration of Current Term – January 4, 2027
- Appointed/Elected: Appointed on May 31, 2024, by Governor Tim Walz
- Employment: Assistant Public Defender – 2007 – 2018
- Employment: Duffy Law Office – 2003 – 2018
- Governor Tim Walz appointed Duffy to replace the late Honorable Darlene Rivera Spalla.
- Chambered in Mahnomen County and handles cases in criminal, family, and juvenile law.

## 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

### remote hearing recording

Scope: statewide

Minnesota Judicial Branch remote-hearing guidance says recording or broadcasting a remote proceeding is not authorized except as provided by court rules.

Evidence excerpt: No recording or broadcasting of any remote proceeding is authorized other than as provided by court rules.

[Remote Hearing Information](https://mncourts.gov/remote-hearings)
Source checked: 2026-07-26

### camera audio recording devices

Scope: statewide

Minnesota court guidance cites Rule 4 of the Minnesota General Rules of Practice and says pictures or voice recordings are not allowed except the official court record.

Evidence excerpt: According to Rule 4 of the MN Rules of General Practice for the District Courts, no pictures or voice recordings

[Security & Weapons Screening - Going to Court](https://mncourts.gov/find-courts/hennepin/going-to-court/security-weapons-screening)
Source checked: 2026-07-26


## Sources

- [Official profile](https://mncourts.gov/about-the-courts/judicialdirectory/active-judicial-officers/09-district/seamus-p.-duffy)
- [Official roster](https://mncourts.gov/about-the-courts/judicialdirectory/active-judicial-officers/09-district/seamus-p.-duffy)
- [Minnesota Judicial Branch official judicial roster](https://mncourts.gov/about-the-courts/judicialdirectory/active-judicial-officers/09-district/seamus-p.-duffy)
- [Remote Hearing Information](https://mncourts.gov/remote-hearings)
- [Security & Weapons Screening - Going to Court](https://mncourts.gov/find-courts/hennepin/going-to-court/security-weapons-screening)
- [Judge Seamus P. Duffy](https://mncourts.gov/about-the-courts/judicialdirectory/active-judicial-officers/09-district/seamus-p.-duffy)

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## Published courtroom rules

### Shared court rules

- [Remote Hearing Information](https://knowjudges.com/courtroom-rules/national-shared-set-5920703a4c3a43b48164d80e) — 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://mncourts.gov/remote-hearings). Collected 2026-07-26.
- [Security & Weapons Screening - Going to Court](https://knowjudges.com/courtroom-rules/national-shared-set-c45898f557aa190822c0bdd8) — 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://mncourts.gov/find-courts/hennepin/going-to-court/security-weapons-screening). Collected 2026-07-26.