# Mike Derby Mike Derby is a Republican member of the South Dakota House for district 34. - Party: Republican - Seat: South Dakota House, district 34 - Serving since: 2021-01-12 - Current term: SD 2025–26 session - Open States ID: ocd-person/082e4c6e-c16a-4bfa-8c17-9c46952da446 Source: https://americaspoliticalpulse.com/p/082e4c6e-c16a-4bfa-8c17-9c46952da446 (America’s Political Pulse, Polarization Research Lab), data through 2026-10-27. Data under CC BY 4.0. Cite as: Westwood, Sean J., and Yphtach Lelkes. 2024. America's Political Pulse [data set]. ## Headline 60% of the 15 bills Derby sponsored got out of committee, the lowest of 69 in the South Dakota House. ## Ideology (CSIP) CSIP score +0.21 (standard error 0.01), from 164 donors and 992 roll calls. Negative is left of 0, positive right of it, on one scale for every official. 27% of State House Republicans score lower. ## Votes (SD 2025–26 session) 727 roll calls. Attendance 100% (South Dakota House 96.6%). Party unity 61% (76%). 88 votes against the party majority. Key votes: - 2026-03-12 · voted yea · Do Pass Amended · SB 78 revise the General Appropriations Act for fiscal year 2026. · pass · https://openstates.org/sd/bills/2026/SB78/ - 2026-03-12 · voted yea · Do Pass Amended · HB 1051 revise property tax levies for school districts and to revise the state aid to general and special education formulas. · pass · https://openstates.org/sd/bills/2026/HB1051/ - 2026-03-12 · voted yea · Do Pass · HB 1326 appropriate money for the ordinary expenses of the legislative, judicial, and executive departments of the state, the current expenses of state… · pass · https://openstates.org/sd/bills/2026/HB1326/ - 2026-03-11 · voted yea · Do Pass Amended · SB 78 revise the General Appropriations Act for fiscal year 2026. · pass · https://openstates.org/sd/bills/2026/SB78/ - 2026-03-11 · voted yea · Do Pass Amended · HB 1051 revise property tax levies for school districts and to revise the state aid to general and special education formulas. · pass · https://openstates.org/sd/bills/2026/HB1051/ - 2026-03-11 · voted yea · Do Pass · HB 1326 appropriate money for the ordinary expenses of the legislative, judicial, and executive departments of the state, the current expenses of state… · pass · https://openstates.org/sd/bills/2026/HB1326/ - 2026-03-09 · voted yea · Do Pass Amended · SB 219 require that a state agency consult with the Aeronautics Commission prior to purchasing, transferring, or disposing of a state owned and operated… · pass · https://openstates.org/sd/bills/2026/SB219/ - 2026-03-09 · voted yea · Do Pass Amended · SB 245 create the homeowner property tax reduction fund, and to transfer moneys to the homeowner property tax reduction fund. · pass · https://openstates.org/sd/bills/2026/SB245/ - 2026-03-09 · voted yea · Do Pass Amended · SB 221 regulate the retail sale of nicotine products, and to provide a penalty therefor. · pass · https://openstates.org/sd/bills/2026/SB221/ - 2026-03-09 · voted yea · Do Pass Amended · SB 222 make an appropriation for eligible water, wastewater, storm water, and riparian buffer initiative projects and to declare an emergency. · pass · https://openstates.org/sd/bills/2026/SB222/ ## Legislation (SD 2025–26 session) Sponsored 15 bills: 11 reached committee, 6 passed one chamber, 1 passed both, 0 became law. Cosponsored 0. 60.0% of sponsored bills got out of committee (South Dakota House 81.4%; rank 69 of 69). Recent sponsored bills: - HC 8018: celebrating the seventy-fifth anniversary of the creation of the Legislative Research Council. (introduced, 2026-03-03) https://openstates.org/sd/bills/2026/HC8018/ - HC 8016: honoring the South Dakota Health Care Association on its seventy-fifth anniversary. (introduced, 2026-03-02) https://openstates.org/sd/bills/2026/HC8016/ - HB 1136: make an appropriation for the development of South Dakota. (in committee, 2026-02-24) https://openstates.org/sd/bills/2026/HB1136/ - HB 1134: make an appropriation for the economic development prosperity of South Dakota. (passed one chamber, 2026-03-09) https://openstates.org/sd/bills/2026/HB1134/ - HB 1135: make an appropriation to enhance the economic health of South Dakota. (passed one chamber, 2026-03-09) https://openstates.org/sd/bills/2026/HB1135/ - SCR 603: supporting the secretary of the United States Department of Agriculture in establishing a working group of nutrition experts to determine national standards… (in committee, 2026-01-29) https://openstates.org/sd/bills/2026/SCR603/ - HCR 6005: supporting January as National Blood Donor Month. (in committee, 2026-01-26) https://openstates.org/sd/bills/2026/HCR6005/ - SCR 605: Promoting a resilient and healthy Black Hills forest through active forest management and retention of the current forest products industry. (in committee, 2025-02-21) https://openstates.org/sd/bills/2025/SCR605/ - HCR 6002: Urging the United States Congress and the President of the United States to remove the requirement of a project labor agreement for federal construction… (in committee, 2025-02-21) https://openstates.org/sd/bills/2025/HCR6002/ - HB 1170: make an appropriation for economic development in South Dakota. (passed one chamber, 2025-03-06) https://openstates.org/sd/bills/2025/HB1170/ ## Campaign money (2024 cycle) Itemized receipts $57.1K (State House Republicans median $10.7K). 97% of itemized individual money came from in state. Aggregates only; no individual donors. ## Links - Official site: https://sdlegislature.gov/Legislators/Profile/4491/Detail - Campaign site: https://www.mikederbyforsdhouse.com/ - Facebook: https://www.facebook.com/mike.derby.3386 - Facebook: https://www.facebook.com/mikederbyforsdhouse/ - YouTube: https://www.youtube.com/@mikederbyforsdhousedirstri7500 - LinkedIn: https://www.linkedin.com/in/mike-derby-44a52260/ Full profile, with every chart and the methods: https://americaspoliticalpulse.com/p/082e4c6e-c16a-4bfa-8c17-9c46952da446