John Marquardt

Background

Marquardt is chairman of the Yankton County Commission, a role he has held since 2023, according to local reporting. He is running as a Republican for the South Dakota House in District 18.

Sources: KYNT, Marquardt Announces Candidacy for House of Representatives in 2026, South Dakota Public Broadcasting, Meet the Candidates: John Marquardt (2026)

What the candidate has said

Statements are attributed to the linked sources.

• Taxes and education

  He lists property-tax reform and public-education stability among the issues for the next legislative session.

  South Dakota Public Broadcasting, Meet the Candidates: John Marquardt (2026)

• County funding

  He says he would seek fiscal-impact statements showing county costs before state mandates are enacted and increased state participation in existing or newly assigned county responsibilities.

  South Dakota Public Broadcasting, Meet the Candidates: John Marquardt (2026)

• Local services

  He identifies public safety, health care and emergency medical services, agriculture and water, and economic development among his priorities.

  South Dakota Public Broadcasting, Meet the Candidates: John Marquardt (2026)