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Legislators › Senate

Sen. Mark Costello

Republican · Senate District 8 · Mills

In office since 2013 · 7 General Assemblies · Chair, Health and Human Services Appropriations Subcommittee

Get their floor votes and new bills they sponsor. Votes against their party come right away.

mark.costello@legis.iowa.gov

Official profile
1639
floor votes cast
<1%
of votes missed (1)
98%
voted with their party’s majority · broke with it 33 times
380 of 383
party-line votes with their party (when the two parties split)

30 of their 33 breaks with their party came on bipartisan votes, where most of both parties voted the same way, so they don’t count against the party-line record.

Votes most like

How often they voted the same way (yes or no) as each Senate colleague in the 2026 session. How it’s worked out

Closest across the aisle: Mike Zimmer (D), 77%.

Lobbying groups they vote with

Sen. Mark Costello’s contested votes in the 2026 session, compared with the sides 80 organizations registered on those bills.

Each legislator’s last floor vote on a bill is compared with the side the organization registered on it (its latest declaration; undecided doesn’t count). Only contested votes count, where at least a tenth of the chamber voted the other way, since most bills pass nearly unanimously. A vote on an amended bill may not be the version that was lobbied. Organizations with fewer than 3 such votes aren’t listed. Lining up with a group doesn’t mean it swayed the vote.

Recent votes

All 1640 votes →

Votes against their party

  • HF 2200 A bill for an act relating to activities in the administration of alcoholic beverage control by the …
    April 28, 2026 · voted no; Republicans voted 28–3 · Roll call
    No
  • HF 2780 A bill for an act relating to alcoholic beverage control by providing for certificates of compliance…
    April 27, 2026 · voted no; Republicans voted 26–4 · Roll call
    No
  • HF 990 A bill for an act relating to the issuance of medical cannabidiol registration cards and licensure o…
    April 16, 2026 · voted no; Republicans voted 26–5 · Roll call
    No
  • HF 2200 A bill for an act relating to activities in the administration of alcoholic beverage control by the …
    April 1, 2026 · voted no; Republicans voted 28–2 · Roll call
    No
  • SF 2444 A bill for an act creating regulations for cigar bars, modifying the smokefree air Act, and includin…
    March 9, 2026 · voted no; Republicans voted 26–3 · Roll call
    No
  • SF 383 A bill for an act relating to pharmacy benefits managers, pharmacies, prescription drugs, and pharma…
    April 28, 2025 · voted no; Republicans voted 31–3 · Roll call
    No
  • HF 994 A bill for an act concerning quarterly reports on and payments of beer barrel and wine gallonage tax…
    April 23, 2025 · voted no; Republicans voted 32–1 · Roll call
    No
  • HF 470 A bill for an act relating to alcoholic beverages, including license authorizations, bond requiremen…
    April 14, 2025 · voted no; Republicans voted 30–1 · Roll call
    No
  • HF 131 A bill for an act relating to matters under the purview of the credit union division of the departme…
    April 18, 2024 · voted no; Republicans voted 31–1 · Roll call
    No
  • HF 2669 A bill for an act relating to the sale of wine, including private wine sales and wine auction permit…
    April 15, 2024 · voted no; Republicans voted 32–1 · Roll call
    No
  • HF 2648 A bill for an act relating to alcoholic beverage licenses, including native distilled spirits altern…
    April 9, 2024 · voted no; Republicans voted 30–1 · Roll call
    No
  • SF 2335 A bill for an act relating to the licensure of medical cannabidiol dispensaries. (Formerly SSB 3100 …
    April 2, 2024 · voted no; Republicans voted 31–3 · Roll call
    No
  • HF 131 A bill for an act relating to matters under the purview of the credit union division of the departme…
    March 18, 2024 · voted no; Republicans voted 30–4 · Roll call
    No
  • HF 2277 A bill for an act relating to prohibited conduct of a brewer with regard to wholesaler agreements. (…
    February 26, 2024 · voted no; Republicans voted 29–1 · Roll call
    No
  • SF 2071 A bill for an act relating to bingo games, including the price to play and the value of merchandise …
    February 26, 2024 · voted no; Republicans voted 29–1 · Roll call
    No
  • HF 677 A bill for an act relating to native winery and native brewery retail alcohol licenses. (Formerly HF…
    May 4, 2023 · voted no; Republicans voted 32–1 · Roll call
    No
  • HF 158 A bill for an act relating to alcohol beverage control concerning product placement and inducements …
    April 17, 2023 · voted no; Republicans voted 32–2 · Roll call
    No
  • HF 478 A bill for an act concerning alcoholic beverage control relating to brewpubs and alternating proprie…
    April 17, 2023 · voted no; Republicans voted 33–1 · Roll call
    No
  • SF 326 A bill for an act relating to the ordering and administering of epinephrine auto-injectors and self-…
    March 15, 2023 · voted no; Republicans voted 30–3 · Roll call
    No
  • HF 205 A bill for an act relating to the distribution of certain barrel tax revenues collected on beer. (Fo…
    March 7, 2023 · voted no; Republicans voted 31–2 · Roll call
    No
  • HF 2497 A bill for an act relating to gambling regulation and wagering, concerning cashless wagering, forfei…
    May 23, 2022 · voted no; Republicans voted 22–8 · Roll call
    No
  • HF 2378 A bill for an act relating to pari-mutuel wagering, concerning distribution of horse racing purse mo…
    April 12, 2022 · voted no; Republicans voted 28–2 · Roll call
    No
  • SF 2374 A bill for an act concerning the regulation of food and beverages, relating to alcoholic beverage co…
    March 29, 2022 · voted no; Republicans voted 28–3 · Roll call
    No
  • HF 513 A bill for an act relating to pari-mutuel wagering on horse or dog races licensed in a foreign juris…
    May 19, 2021 · voted no; Republicans voted 24–4 · Roll call
    No
  • HF 384 A bill for an act relating to alcohol beverage control concerning certain class “C” liquor control l…
    May 5, 2021 · voted no; Republicans voted 29–2 · Roll call
    No
  • HF 768 A bill for an act concerning licensing of and sales by native distilleries, beer manufacturers, nati…
    April 28, 2021 · voted no; Republicans voted 29–1 · Roll call
    No
  • HF 766 A bill for an act relating to the delivery of alcoholic beverages by retailers. (Formerly HSB 214 .)…
    April 21, 2021 · voted no; Republicans voted 27–2 · Roll call
    No
  • HF 311 A bill for an act relating to the frequency of game nights conducted by licensed qualified organizat…
    April 7, 2021 · voted no; Republicans voted 25–2 · Roll call
    No
  • HF 737 A bill for an act relating to the regulation of persons involved with animals other than livestock a…
    June 13, 2020 · voted no; Republicans voted 27–4 · Roll call
    No
  • HF 2540 A bill for an act concerning alcoholic beverage control, establishing a charity beer, spirits, and w…
    June 12, 2020 · voted no; Republicans voted 28–3 · Roll call
    No
  • HF 2589 A bill for an act concerning the medical cannabidiol Act and marijuana. (Formerly HSB 653 .) Effecti…
    June 3, 2020 · voted no; Republicans voted 29–3 · Roll call
    No
  • HF 737 A bill for an act relating to the regulation of persons involved with animals other than livestock a…
    March 4, 2020 · voted no; Republicans voted 27–3 · Roll call
    No
  • SF 2134 A bill for an act relating to the manufacturing of canned cocktails by a beer manufacturer and inclu…
    February 6, 2020 · voted no; Republicans voted 28–2 · Roll call
    No