The Ballot Brief
Muskegon County, Michigan

Judge of Court of Appeals, 3rd District, Incumbent Position

2 candidates are tracked for Judge of Court of Appeals, 3rd District, Incumbent Position on the November 3, 2026 ballot: Mark T. Boonstra and Daniel S. Korobkin. Candidate information follows official Muskegon County election filings; verify with the official election office linked below.

About this race

Nonpartisan; two incumbents seeking re-election to two seats, unopposed on the November 3 ballot, per the Muskegon County Clerk's official candidate list.

What this office does

Appellate or supreme court justice. Appellate judges review decisions of trial courts for legal error rather than retrying facts. A state supreme court is the final word on state law and the state constitution. Candidates may describe their experience and judicial philosophy but may not promise outcomes in particular cases.

This race. Nonpartisan: candidates appear without party labels.

Michigan › Muskegon County › Judge of Court of Appeals, 3rd District, Incumbent Position

Mark T. Boonstra

Nonpartisan

Biography

Mark T. Boonstra was appointed to the Michigan Court of Appeals, 3rd District, in March 2012 and was subsequently elected in 2012, 2014 and 2020, per Michigan Courts. He served a two-year term on the Michigan Court of Claims by appointment of the Michigan Supreme Court from 2015 to 2017, per Michigan Courts. Before joining the bench he was a senior principal at Miller, Canfield, Paddock and Stone for 27 years, per Michigan Courts. He earned Juris Doctor and Master of Applied Economics degrees from the University of Michigan in 1983, per Michigan Courts. No campaign website was found as of September 27, 2026.

Daniel S. Korobkin

Nonpartisan

Biography

Daniel S. Korobkin was appointed to the Michigan Court of Appeals, 3rd District, by Governor Gretchen Whitmer in 2025, per Michigan Courts. Before joining the Court, he was an attorney with the American Civil Liberties Union of Michigan for more than 16 years, including five years as Legal Director, per Michigan Courts. He holds a law degree from Yale Law School and a B.A. in philosophy from Swarthmore College, and lives in Ann Arbor, per Michigan Courts. No campaign website was found as of September 27, 2026.

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Questions about this race

Who is running for Judge of Court of Appeals, 3rd District, Incumbent Position in 2026?

2 candidates are tracked for Judge of Court of Appeals, 3rd District, Incumbent Position on the November 3, 2026 ballot: Mark T. Boonstra and Daniel S. Korobkin. Candidate information follows official Muskegon County election filings; verify with the official election office linked below.

When is the Judge of Court of Appeals, 3rd District, Incumbent Position election in Michigan?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Michigan are on the Michigan election hub at theballotbrief.com.

How do I see my exact Muskegon County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official Muskegon County and state election office filings, last verified October 2, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Michigan election office, or see the full Muskegon County sample ballot and your exact ballot by address.

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22 tracked races in Muskegon County, Michigan. Landed here from another county's search? Look up your own ballot below.

Also on your ballot
Judge of District Court, 60th District, Incumbent PositionCity of Montague MayorCity of Montague Council MemberSee all 22 Muskegon County races
Candidate profiles
Mark T. Boonstra, full profileDaniel S. Korobkin, full profileOfficial Michigan election office