Photo: costlowformissouri.comMO · Officeholder
RState Representative · District 108
On the ballot Nov 3, 2026: Missouri House District 108
Mike Costlow is a Republican state representative who has represented Missouri House of Representatives District 108 since January 2025 and is seeking re-election in the November 3, 2026 general election. A small business owner who worked in the IT industry, he owned and operated the Village Café of Lake St. Louis.[1][2]
Costlow graduated from Lowndes High School in 2005 and earned a bachelor's degree and an MBA from Western Governors University, the latter in 2018.[1] His career experience includes working in the IT industry and owning and operating the Village Café of Lake St. Louis.[1] As of his 2024 campaign, Costlow was an alderman for the city of Dardenne Prairie, Missouri.[1]
Costlow took office on January 8, 2025.[1] For the 2025-2026 session, he was assigned to the House General Laws Committee, the Utilities Committee, the House Education Committee and the Children and Families Committee.[1]
Researched from the cited sources on 2026-10-21. Not yet independently fact-checked.
Mike Costlow is on the Nov 3, 2026 ballot for Missouri House District 108 as R. Not researched in depth — candidate list only.
Their recorded votes on bills that divided the chamber (unanimous votes left out), grouped by topic. A bill can sit under more than one topic. "With" and "against" compare each vote with how most Republicans voted. How topics are assigned
Most contested
Appropriates money for the expenses, grants, refunds, and distributions of the Office of Administration, the Department of Transportation, the Department of Conservation, the Department of Public Safety, and the Chief Executive's Office
Mar 24, 2026 · Failed 60–78 · with most RepublicansOfficial record ↗
Relating to creation of a sovereign wealth fund for the state of Missouri
Submits to voters an amendment creating the Show-Me Prosperity Fund, invested in S&P 500 index funds. Once its earnings can replace the revenue, appropriations capped at 3% of its five-year average value may be used solely to eliminate state income, sales, corporate and other taxes.
May 15, 2026 · Passed 85–56 · with most RepublicansOfficial record ↗
Relating to workers' compensation
Modifies provisions relating to workers' compensation
Apr 2, 2025 · Passed 83–66 · with most RepublicansOfficial record ↗
Most contested
Relating to school board elections
Moves school board elections in districts mostly in counties of 400,000 to 500,000 people to November of even-numbered years from 2028 with four-year terms, lets candidates choose to list a party, and puts school tax and bond proposals on those ballots.
May 15, 2026 · Failed 57–79 · with most RepublicansOfficial record ↗
Relating to the unlawful use of unmanned aircraft in certain areas
On the version voted May 15, 2026: Makes two parts of the bill take effect immediately: authority for certified peace officers to mitigate credible drone threats, and a revised drone offense over open-air venues (now 500-person capacity, was 5,000) and critical infrastructure.
May 5, 2026 · Passed 75–68 · with most RepublicansOfficial record ↗
Establishes provisions relating to parental rights
Apr 30, 2026 · Failed 70–60 · with most RepublicansOfficial record ↗
Most contested
Relating to school board elections
Moves school board elections in districts mostly in counties of 400,000 to 500,000 people to November of even-numbered years from 2028 with four-year terms, lets candidates choose to list a party, and puts school tax and bond proposals on those ballots.
May 15, 2026 · Failed 57–79 · with most RepublicansOfficial record ↗
Establishes provisions relating to parental rights
Apr 30, 2026 · Failed 70–60 · with most RepublicansOfficial record ↗
Establishes and modifies provisions relating to adult education
Mar 25, 2026 · Failed 55–82 · with most RepublicansOfficial record ↗
Most contested
Relating to reproductive health care
Proposes a constitutional amendment that establishes provisions relating to reproductive health care
Apr 15, 2025 · Passed 94–50 · with most RepublicansOfficial record ↗
Relating to physical education in schools
Modifies requirements for physical education in schools
Mar 26, 2026 · Passed 82–65 · with most RepublicansOfficial record ↗
Proposes a constitutional amendment relating to MO HealthNet work requirements
Feb 19, 2026 · Passed 99–48 · with most RepublicansOfficial record ↗
Most contested
Modifies labeling for certain pesticides
Feb 20, 2025 · Passed 85–72 · against most RepublicansOfficial record ↗
Relating to a training program for Missouri rangers
Directs the POST commission to create a Missouri Rangers training program of up to 160 hours with a fitness test; rangers employed by schools get limited arrest powers on school property and may carry firearms if the school authorizes.
May 13, 2026 · Passed 98–48 · with most RepublicansOfficial record ↗
Missouri nuclear clean power act
Allows electrical corporations to charge for services based on the costs of certain construction work in progress
Apr 7, 2026 · Passed 95–53 · with most RepublicansOfficial record ↗
Most contested
Relating to emergency vehicles
May 8, 2025 · Failed 57–66 · with most RepublicansOfficial record ↗
Relating to the speed limit on certain roads of this state
On the version voted May 15, 2026: Raises the uniform speed limit on rural interstates and freeways from 70 to 75 miles per hour and raises the maximum limit the state may set on state roads to 75.
Apr 30, 2026 · Passed 82–53 · with most RepublicansOfficial record ↗
Establishes provisions relating to autonomous vehicles
Mar 10, 2026 · Passed 85–51 · with most RepublicansOfficial record ↗
Most contested
Relating to classification of certain residential real property
Apr 23, 2026 · Passed 83–61 · with most RepublicansOfficial record ↗
Relating to applications for property developments
Creates provisions restricting political subdivisions from imposing requirements that threaten affordability of developments or improvements of property
Feb 16, 2026 · Passed 92–61 · with most RepublicansOfficial record ↗
Relating to real property valuation assessments
Modifies provisions relating to the assessed valuation of residential real property
Mar 27, 2025 · Passed 90–56 · with most RepublicansOfficial record ↗
Most contested
Relating to the unlawful use of unmanned aircraft in certain areas
On the version voted May 15, 2026: Makes two parts of the bill take effect immediately: authority for certified peace officers to mitigate credible drone threats, and a revised drone offense over open-air venues (now 500-person capacity, was 5,000) and critical infrastructure.
May 5, 2026 · Passed 75–68 · with most RepublicansOfficial record ↗
Establishes provisions relating to autonomous vehicles
Mar 10, 2026 · Passed 85–51 · with most RepublicansOfficial record ↗
Relating to the assessment of certain broadband communications equipment
Modifies provisions relating to the assessment of certain broadband communications equipment
Apr 9, 2026 · Passed 91–46 · with most RepublicansOfficial record ↗
Most contested
Relating to tuition for military personnel
Relating to education
May 12, 2025 · Passed 149–7 · with most RepublicansOfficial record ↗
Relating to veteran preferences for contracts
Creates provisions relating to veteran preferences for contracts
Mar 12, 2026 · Passed 137–2 · with most RepublicansOfficial record ↗
Repairing and resetting grave markers for deceased veterans
Establishes a grant program to provide funds to repair and reset grave markers for deceased veterans
Apr 9, 2026 · Passed 137–2 · with most RepublicansOfficial record ↗
Voted against most of their party on 6 of 323 party-divided votes on file.
Most often on: Climate & energy (3), Jobs & cost of living (2)
Relating to the attorney general
What it does: Modifies provisions for the staffing of the attorney general's office and the capitol
Voted no · most Republicans voted yes · Democrats 0–46, Republicans 88–12
Mar 2, 2026Official record ↗
Relating to duties of the department of natural resources
What it does: Modifies provisions relating to environmental protection.
Voted yes · most Republicans voted no · Democrats 43–0, Republicans 34–53
Apr 23, 2025Official record ↗
Relating to video lottery games
What it does: Establishes provisions relating to video lottery gaming terminals, licenses, and regulation
Voted yes · most Republicans voted no · Democrats 31–13, Republicans 36–57
Apr 7, 2025Official record ↗
Paid sick leave for certain employees
What it does: Modifies provisions relating to employee compensation
Voted no · most Republicans voted yes · Democrats 0–48, Republicans 84–14
Mar 13, 2025Official record ↗
Relating to hunting permits
What it does: Establishes protections for landowners taking wildlife on the landowner's property
Voted no · most Republicans voted yes · Democrats 9–34, Republicans 98–7
Mar 12, 2025Official record ↗
The votes in their chamber that came out closest and most divided by party, among those they voted on. How we rank
Relating to emergency vehicles
With most of their party · Failed 57–66 · Yes 57–No 66 · Democrats 47–0, Republicans 10–66
May 8, 2025Official record ↗
With most of their party · Failed 60–78 · Yes 60–No 78 · Democrats 47–0, Republicans 13–78
Mar 24, 2026Official record ↗
Relating to school board elections
With most of their party · Failed 57–79 · Yes 57–No 79 · Democrats 47–0, Republicans 10–79
May 15, 2026Official record ↗
Relating to the unlawful use of unmanned aircraft in certain areas
With most of their party · Passed 75–68 · Yes 75–No 68 · Democrats 0–46, Republicans 75–22
May 5, 2026Official record ↗
Relating to the designation of infrastructure
With most of their party · Failed 57–82 · Yes 57–No 82 · Democrats 48–0, Republicans 9–82
May 13, 2026Official record ↗
With most of their party · Failed 70–60 · Yes 70–No 60 · Democrats 0–41, Republicans 70–19
Apr 30, 2026Official record ↗
Relating to creation of a sovereign wealth fund for the state of Missouri
With most of their party · Passed 85–56 · Yes 85–No 56 · Democrats 0–48, Republicans 85–8
May 15, 2026Official record ↗
Relating to workers' compensation
With most of their party · Passed 83–66 · Yes 83–No 66 · Democrats 0–48, Republicans 83–18
Apr 2, 2025Official record ↗
Substantive votes concern legislation or nominations; procedural votes concern how the chamber considers them. A Yes vote applies to the motion shown, which may not be final passage.
Motion: Previous question
A yes vote would have ended debate and forced an immediate vote on House Resolution 2, which informed the Senate that the House adopted no motions to override the Governor's vetoes of HB 2002-2012 and HB 2017. (AI-written)
Appropriates money for capital improvements
Motion: Final passage (truly agreed to and finally passed)
Modifies provisions relating to the right of sepulcher
Motion: Adopt SS SCS HCS HB 1696, as amended
A yes vote adopted the Senate's version of HB 1696, which changes who is next-of-kin for the right of sepulcher and requires criminal background checks for residential camp staff and volunteers. (AI-written)
Modifies provisions relating to the right of sepulcher
Motion: Previous question
A yes vote ended debate on the Senate's version of HB 1696 (right of sepulcher and camp staff background checks) so the House could vote on adopting it (previous question). (AI-written)
Modifies provisions relating to the right of sepulcher
Motion: Final passage (truly agreed to and finally passed)
Modifies provisions governing design-build contracts
Motion: Adopt SCS HCS HB 2474, as amended
A yes vote adopted the Senate's version of HB 2474, which adds progressive design-build contracts to public contract law and authorizes more cooperative purchasing agreements by the state. (AI-written)
Modifies provisions governing design-build contracts
Motion: Final passage (truly agreed to and finally passed)
Modifies provisions relating to the governing bodies of certain public institutions of higher education
Motion: Adopt SS SCS HB 2896
Modifies provisions relating to the governing bodies of certain public institutions of higher education
Motion: Previous question
A yes vote ended debate on the Senate's version of HB 2896 (higher education boards and related education changes) so the House could vote on adopting it (previous question). (AI-written)
Modifies provisions relating to the governing bodies of certain public institutions of higher education
Motion: Final passage (truly agreed to and finally passed)
Modifies provisions relating to abuse and neglect reporting, including a requirement to report companion animal abuse
Showing 10 of 779 votes in this collection. Coverage may be incomplete; each entry links to the official record.