Legislators › Senate
Sen. Mark Costello
Republican · Senate District 8 · Mills
In office since 2013 · 7 General Assemblies · Chair, Health and Human Services Appropriations Subcommittee
Report card · 2026 session
Compared with the 50 members of the Senate who cast votes this session. Rank 1 is highest.
Attendance
Chamber average 90.6% · 1st of 50
voted on 281 of 281 roll calls
With their party
Chamber average 97.5% · 25th of 48
of 281 votes cast
Bills sponsored
Chamber average 15 · 46th of 50
as a named sponsor (committee bills not counted)
Became law
Chamber average 1 · 15th of 50
0% of bills they sponsored, counting companions
Amendments adopted
Chamber average 70% · 1st of 33
6 of 6 that got a vote · 8 filed
Numbers count recorded floor votes, bills where Mark Costello is a named sponsor, and amendments they filed or co-signed. Committee work, which is most of a legislator’s job, isn’t captured here. What each measure means
Time in office
In the Legislature since 2013 · 7 General Assemblies
- House 2013–2015 · 1 term
- Senate 2015–now · 6 terms
Serving fourth term in Senate. Served one term in House.
Committees chaired
- Health and Human Services (vice chair) · 91st GA
- Health and Human Services Appropriations Subcommittee · 91st GA
Committee roles since the 88th General Assembly (2019).
Every General Assembly
- 91st · Senate District 8 · Republican
- 90th · Senate District 8 · Republican
- 89th · Senate District 12 · Republican
- 88th · Senate District 12 · Republican
- 87th · Senate District 12 · Republican
- 86th · Senate District 12 · Republican
- 85th · House District 23 · Republican