Legislators › Senate
Sen. Mark Costello
Republican · Senate District 8 · Mills
In office since 2013 · 7 General Assemblies · Chair, Health and Human Services Appropriations Subcommittee
Bills sponsored · 13
- SR 111 Recognizing the 150th anniversary of the establishment of the University of Northern IowaAdopted
- SJR 2012 Supporting devolution of power from the United States department of education to the statesDid not pass
- SJR 2008 Supporting devolution of power from the United States department of education to the statesDid not pass
- SR 104 Recognizing and honoring the Young Men’s Christian Association (YMCA) on its 175th anniversaryNot adopted
- SR 101 Honoring Staff Sergeant William Nathaniel Howard, Staff Sergeant Edgar Brian Torres-Tovar, and their familiesAdopted
- SF 500 Relating to establishing the school security personnel grant program within the department of homeland securit…Died when the session ended
- SF 490 Relating to the maximum power output for low-speed electric bicycles and pedestrian conveyances powered by an …Signed by Governor
- SF 423 Relating to deer hunting, including deer depredation and the purchasing of a youth deer hunting license and ta…Signed by Governor
- SF 375 Relating to the maximum power output for low-speed electric bicycles and pedestrian conveyances powered by an …Renumbered as SF 490
- SF 367 Designating kratom as a schedule I controlled substance, and making penalties applicableDied when the session ended
- SF 331 Relating to the purchasing of a youth deer hunting license and tagRenumbered as SF 423
- SJR 6 Proposing an amendment to the Constitution of the State of Iowa by repealing the natural resources and outdoor…Did not pass
- SF 320 Creating a capital murder offense by establishing the penalty of death for murder in the first degree of a pea…Died when the session ended
Amendments filed · 11
9 adopted of 9 voted on (100%). Includes amendments they co-signed. Newest first.
- S-5249 to SF 2483Strike everything · filed May 2, 2026 by MARK COSTELLOAdoptedReplaces the whole bill with new text.May 2, 2026
- S-5217 to SF 2167Strike everything · filed April 27, 2026 by MARK COSTELLOAdoptedReplaces the whole bill with new text.Amends this SF 2167 to CONFORM to HF 2598May 2, 2026
- S-5195 to HF 2562 · filed April 20, 2026 by MARK COSTELLOAdoptedPage 1, before line 1 by inserting: “DIVISION I CARE FACILITY PLACEMENT” (12 changes)April 20, 2026
- S-5185 to HF 2305Strike everything · filed April 15, 2026 by MARK COSTELLOAdoptedReplaces the whole bill with new text.April 16, 2026
- S-5184 to HF 2562 · filed April 15, 2026 by MARK COSTELLORuled out of orderPage 1, before line 1 by inserting: “DIVISION I CARE FACILITY PLACEMENT” (4 changes)April 20, 2026
- S-5140 to HF 2305Strike everything · filed March 30, 2026 by MARK COSTELLORuled out of orderReplaces the whole bill with new text.April 16, 2026
- S-5125 to SF 2464Strike everything · filed March 24, 2026 by MARK COSTELLOAdoptedReplaces the whole bill with new text.Amends this SF 2464 to CONFORM to HF 2739March 24, 2026
- S-5048 to SF 2423Strike everything · filed March 2, 2026 by MARK COSTELLOAdoptedReplaces the whole bill with new text.Amends this SF 2423 to CONFORM to HF 2562April 20, 2026
- S-3158 to SF 649Strike everything · filed May 12, 2025 by MARK COSTELLOAdoptedReplaces the whole bill with new text.May 13, 2025
- S-5219 to SF 2395Strike everything · filed April 19, 2024 by MARK COSTELLO, TIM KRAAYENBRINKAdoptedReplaces the whole bill with new text.April 19, 2024
- S-5200 to SF 2437Strike everything · filed April 18, 2024 by MARK COSTELLOAdoptedReplaces the whole bill with new text.April 19, 2024