RepublicanIn office since Nov 2018

Robert M. "Robby" Mills

Kentucky State Senator, District 4 since 2018. Re-elected in 2026. Next on the ballot in 2030.

Kentucky State Senator, District 4Born 1967

Official website Wikipedia

In office: 7 yrs; Since 2018
Bills became law: 18; 44 sponsored, 2025–2026 session
Votes missed: 0.2%; Chamber median 2.2%
With party: 100%; On votes splitting the parties
Last margin: +33.3; Won 2022
Next election: 2030; Nov 5, 2030

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET

Committees

As of 2026-10.

Housing Task Force · co-chair
Committee on Committees
Families and Children
Families and Children
Health Services
Health Services
Legislative Research Commission
Local Government
Natural Resources and Energy
Natural Resources and Energy
Rules
State Government
State and Local Government

Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET

Legislation

2025–2026 session · 44 sponsored · 18 became law

BillIntroCmteSenateHouseLaw

SB 197 AN ACT providing funding and establishing conditions for state government agencies and institutions, making…
Economic Development · Became law Apr 2026

SB 70 AN ACT relating to the Public Pension Oversight Board.
Boards And Commissions · Became law Apr 2026

SB 8 AN ACT relating to public utilities and declaring an emergency.
Administrative Regulations And Proceedings · Became law Apr 2026

SB 4 AN ACT relating to education and declaring an emergency.
Administrative Regulations And Proceedings · Became law Apr 2026

SB 100 AN ACT relating to the Energy Planning and Inventory Commission and declaring an emergency.
Administrative Regulations And Proceedings · Became law Apr 2026

Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET

Voting record

2025–2026 session · placement by roll-call votes

Where Mills sits in the Kentucky State Senate

Mills is closer to the center than 33% of the chamber's Republicans.

Closest: Craig Richardson, Matt Nunn, Scott Madon

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:50 PM ET

With Mills’s party

Votes with the chamber's Republicans100%

Black tick: the average of Republicans in the Kentucky State Senate.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Mills’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.

Date	Bill	Mills	Rep. majority	Dem. majority	Result
Apr 14, 2026	HB 139: AN ACT relating to elections and declaring an emergency.	Yes	Yes	No	Passed 32–6
Apr 14, 2026	SB 1: AN ACT relating to education.	Yes	Yes	No	Passed 31–7
Apr 14, 2026	SB 59: AN ACT relating to prohibited uses of tax dollars and resources.	Yes	Yes	No	Passed 31–7
Apr 14, 2026	SB 100: AN ACT relating to the Energy Planning and Inventory Commission and declaring an emergency.	Yes	Yes	No	Passed 32–6
Apr 14, 2026	SB 65: AN ACT relating to deficient administrative regulations and declaring an emergency.	Yes	Yes	No	Passed 32–6

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Mills was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

2016201720182019202020212022202320242025202620272028Kentucky House of Representatives, District 11 Kentucky State Senate, District 4

Source: 99chambers results archive (MEDSL, Klarner, state election offices)

Elections

Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.

Year	Race	Result	Margin	Seat	+/−
2026	Kentucky Senate District 4	Won	—	R+44.8	—
2022	Kentucky State Senate, District 4	Won	R+33.3	—	—
2018	Kentucky State Senate, District 4	Won	R+1.3	—	—
2016	Kentucky House of Representatives, District 11	Won	R+3.2	—	—