What party is Mark Groenendyk?

Mark Groenendyk was elected as a Republican; the office is elected on a partisan ballot.

Where does Mark Groenendyk stand politically?

There's no published left–right score for Mark Groenendyk. Most local officials have none: academic scores come from votes in Congress or a state legislature, or from campaign donors, and we don't guess.

Who is Mark Groenendyk? County Supervisor, At-Large, Mahaska County

Mark Groenendyk is the County Supervisor, At-Large, elected as a Republican.

In office

Office	Who holds it now
County Supervisor, At-Large · Mahaska County Board of Supervisors	Mark Groenendyk Republican source

Mahaska County Board of Supervisors (contact the office there) · everyone on it

Where Mark Groenendyk stands

No published left–right score. Most local officials don't have one: the academic scores come from votes in Congress or a state legislature, or from who donates to a campaign, and we don't guess. They were elected on a partisan ballot as a Republican.

Quick answers

Who is Mark Groenendyk?: Mark Groenendyk is the County Supervisor, At-Large, in Mahaska County, Iowa. Elected as a Republican.
What party is Mark Groenendyk?: Mark Groenendyk was elected as a Republican; the office is elected on a partisan ballot.
Where does Mark Groenendyk stand politically?: There's no published left–right score for Mark Groenendyk. Most local officials have none: academic scores come from votes in Congress or a state legislature, or from campaign donors, and we don't guess.

Are you Mark Groenendyk?

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Officeholders as of November 6, 2026, from county election offices' elected-officials pages where they publish one, and elsewhere from the Iowa Secretary of State's certified 2022 and 2024 general election results (each seat's last election); officials appointed since then may differ; each name links to its source. Officials change between elections (appointments, resignations), and the body's own website is the authority. Party is shown only for offices elected on a partisan ballot.

Mahaska County's elected officials

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