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Mark Costello (Iowa)

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Mark Costello
Mark Costello Iowa.jpg
Iowa State Senate, District 12
In office
January 12, 2015 - Present
Term ends
January 8, 2017
Years in position 0
Base salary$25,000/year
Per diem$135/day
Elections and appointments
Last electionDecember 30, 2014
First electedDecember 30, 2014
Next generalNovember 8, 2016
Term limitsN/A
Prior offices
Iowa House of Representatives, District 23
Office website
Mark Costello is a Republican member of the Iowa State Senate, representing District 12 . He was first elected to the chamber in a special election on December 30, 2014. He previously served in the Iowa House of Representatives, representing District 23 from 2013 to 2015.

Committee assignments


At the beginning of the 2013 legislative session, Costello served on the following committees:

Iowa Committee Assignments, 2012
Human Resources
State Government
Veterans Affairs



State senate

See also: Iowa state legislative special elections, 2014

Mark Costello (R) defeated Steven L. Adams (D) and Don W. Brantz (L) in the special election on December 30.[1][2][3]

The seat was vacant following Joni Ernst's (R) election to the United States Senate on November 4, 2014.[4]

A special election for the position of Iowa State Senate District 12 was called for December 30. The filing deadline for candidates wishing to run in this election was December 16.[5]

Iowa State Senate, District 12, Special Election, 2014
Party Candidate Vote % Votes
     Republican Green check mark transparent.pngMark Costello 74.7% 3,138
     Democratic Steven L. Adams 22.2% 932
     Libertarian Don W. Brantz 3.1% 132
Total Votes 4,202

State house

See also: Iowa House of Representatives elections, 2014

Elections for the office of Iowa House of Representatives took place in 2014. A primary election took place on June 3, 2014. The general election was held on November 4, 2014. The signature-filing deadline for candidates wishing to run in this election was March 14, 2014. Incumbent Mark Costello was unopposed in the Republican primary and was unchallenged in the general election.[6][7][8][9]


See also: Iowa House of Representatives elections, 2012

Costello ran in the 2012 election for Iowa House of Representatives District 23. He defeated Raymond Chase in the Republican primary on June 5, 2012. No candidates filed to run in the Democratic primary. The general election took place on November 6, 2012.[10][11]

Iowa House of Representatives, District 23 Republican Primary, 2012
Candidate Vote % Votes
Green check mark transparent.pngMark Costello 66.7% 1,710
Raymond Chase 33.3% 854
Total Votes 2,564

Campaign donors

Comprehensive donor information for Costello is available dating back to 2012. Based on available campaign finance records, Costello raised a total of $7,421 during that time period. This information was last updated on September 19, 2013.[12]

Mark Costello's Campaign Contribution History
Year Office Result Contributions
2012 Iowa State House, District 23 Won $7,421
Grand Total Raised $7,421


Costello won election to the Iowa House of Representatives in 2012. During that election cycle, Costello raised a total of $7,421.
Iowa House of Representatives 2012 election - Campaign Contributions
Top contributors to Mark Costello (Iowa)'s campaign in 2012
Associated General Contractors of Iowa$1,000
Iowa Hospital Association$500
John Deere & Co$500
Iowa Republican Party$500
Hy-Vee Inc$500
Total Raised in 2012$7,421
Source:Follow the Money


See also: State legislative scorecards and State legislative scorecards in Iowa

Legislative scorecards are used to evaluate elected public officials based on voting record. Some scorecards are created by political advocacy groups with a focus on specific issues, while others are developed by newspapers and are broad in scope. Scorecards are meant to be used as a tool for voters to have a quick picture of whether their views align with a particular legislator's record.

Because scorecards can be specific to particular issues or general to a state’s legislative term, for example, each report should be considered on its own merits. Each entity that publishes these reports uses different methodologies and definitions for the terms used.

An overview for scorecards in all 50 states can be found on this page. To contribute to the list of Iowa scorecards, email suggestions to

Please see our writing guidelines if you would like to add results from an individual scorecard to this legislator's profile.

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Political offices
Preceded by
Joni Ernst (R)
Iowa State Senate District 12
Succeeded by
Preceded by
Dan Rasmussen (R)
Iowa House of Representatives District 23
Succeeded by
David Sieck (R)