Mark Costello
State Senator
RepublicanstateIA · District 8
✓ Verified · last checked Jun 2026
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Mark Costello is the Iowa State Senator from the 8th District. A Republican, he has served in the Iowa Senate since being elected in 2014. He had also previously served in the Iowa House of Representatives from 2013–2014.
Source: Wikipedia
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Voting record & actions
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Source: Congress.gov
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