Nonpartisan · Data from OpenStates / Plural Policy · Alaska
Republican
· Representative
Mia Costello
Represents District 15 in the House of Representatives.
Votes with Republicans
90%
on 430 party-line votes · House Republicans median 93%
Cast a vote
100%
Yea or Nay on 717 of 717 roll calls · House median 99%
Their bills that became law
1 of 10
as a primary sponsor, this session · Republicans median 1
Roll calls on record
717
34th Legislature
Votes and bills updated Oct 10, 2026 from LegiScan (CC BY 4.0), which republishes the legislature’s own records. Profile details from OpenStates / Plural Policy. Figures cover 34th Legislature.
How Mia Costello votes
A party-line vote is a roll call where most voting Democrats and most voting Republicans took opposite sides. Absences and not-voting are never counted. Same method as our Congress pages.
Where Mia Costello sits in the House
Each dot is one member of the House, placed by how often they voted on the Democratic side of party-line votes. Mia Costello is circled.
Always on the Republican sideAlways on the Democratic side
Times they broke with their party
42 of 430 party-line votes, most recent 10 shown.
HB280 · Apportion Taxable Income
In plain English Allows the state to apportion business income using the Multistate Tax Compact method for broadcasters, financial institutions, and telecommunications companies.
House: Concur · 2026-05-20 · Passed 28–11 · most Republicans voted the other way
SB258 · Contract: Licensing Software Applications
House: Third Reading Final Passage · 2026-05-20 · Passed 26–13 · most Republicans voted the other way
HB25 · Disposable Food Service Ware
House: Concur · 2026-05-19 · Passed 26–14 · most Republicans voted the other way
SB24 · Tobacco/nicotine/e-cig Age; E-cig Tax
In plain English Raises the minimum age to purchase tobacco and nicotine products, taxes electronic smoking products, and makes related changes to tobacco regulations.
House: Third Reading Final Passage · 2026-05-19 · Passed 24–16 · most Republicans voted the other way
HB10 · Add Faculty Member Univ Board Of Regents
House: Concur · 2026-05-16 · Passed 26–14 · most Republicans voted the other way
SB214 · Approp: Capital/funds/supp/reapprop/amend
House: Second Reading Rescind Previous Action in Failing Amendment No. 2 · 2026-05-13 · Passed 20–19 · most Republicans voted the other way
SB214 · Approp: Capital/funds/supp/reapprop/amend
House: Second Reading Amendment No. 2/Divide the Question · 2026-05-13 · Failed 11–28 · most Republicans voted the other way
SB214 · Approp: Capital/funds/supp/reapprop/amend
House: Second Reading Adopt Finance HCS · 2026-05-13 · Passed 23–16 · most Republicans voted the other way
SCR19 · Extend West Coast Storm Disaster
House: Second Reading Final Passage · 2026-04-24 · Passed 28–11 · most Republicans voted the other way
SCR19 · Extend West Coast Storm Disaster
House: Second Reading Amendment No. 1 · 2026-04-24 · Passed 28–11 · most Republicans voted the other way
Closest votes they cast
Roll calls decided by the fewest votes, one per bill.
HB381 · Oil & Gas Property Tax; Muni Tax; Agdc
House: Adopt · 2026-07-16 · Failed 19–19
SB167 · Pfd Eligibility; Pfd For Overturn Convic.
In plain English Allows individuals whose criminal convictions have been vacated, reversed, or dismissed to receive the permanent fund dividend and includes such payments in dividend value calculations.
House: Second Reading Amendment No. 1 · 2026-05-19 · Failed 20–20
SB180 · Lng Import Facilities
In plain English Allows the Regulatory Commission of Alaska to regulate liquefied natural gas import facilities and relates to development of the Susitna River power project by the Alaska Energy Authority.
House: Second Reading Amendment No. 17 to Amendment No. 2 as amended · 2026-05-18 · Failed 20–20
SB200 · Muni: Svc Areas; Farm & Agricultural Land
House: Second Reading Amendment No. 5 · 2026-05-17 · Failed 20–20
HB193 · Unemployment Ben; Paid Leave: Parent/sick
In plain English Requires employers to provide paid sick leave, establishes a paid parental leave program, and makes changes to unemployment benefits and employer contributions.
House: Second Reading Amendment No. 2 · 2026-05-16 · Failed 20–20
Democrats they vote with most
Share of contested roll calls (the losing side got at least 10%) where both voted and landed on the same side. Unanimous votes are left out, because on those everyone agrees.
Robyn FrierDemocrat · District 40 · 527 shared contested votes
27%
Maxine DibertDemocrat · District 31 · 527 shared contested votes
26%
Carolyn HallDemocrat · District 16 · 531 shared contested votes
26%
Their session, month by month
Dark bars are roll calls they were recorded on each month; the red part is the ones without a Yea or Nay (0 in all). Gaps are months the chamber wasn’t voting.
← Alaska Delegation
NayNayYeaYeaNayNayYeaNayNayYeaYeaNayNayNayYeaYeaYeaYeaYeaYeaYeaYeaYeaNayNayYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaYeaNayYeaYeaYeaYeaYeaYeaYeaYeaYeaNayYeaNayNayNayYeaYeaNayYea
Their bills, from filing to law
Bills Mia Costello was a primary sponsor of this session. Most bills from either party never leave committee; in Illinois many never get past the Assignments or Rules committee.
Introduced10
Out of committee3
Passed one chamber2
Passed both chambers2
Became law1
Never left committee7
For comparison, the median Republican member of the House has 1 bills that became law this session.
What their bills are about
Boards & Commissions 4Employment 3Education 3Economic Development 2Economy 2Credit 2
Urging Support For Natural Gas Project
Became lawPERMANENTLY FILED 9/22 LEGIS RESOLVE 56 · 2026-09-30
Economic Dev:ak-ireland Trade Comm.
In plain English Creates the Alaska-Ireland Trade Commission.
Official synopsis: An Act establishing the Alaska-Ireland Trade Commission; and providing for an effective date.
VetoedVETOED BY GOVERNOR 6/24/26 · 2026-07-03
Members Leg Council; Leg Budget & Audit
An Act relating to the membership of the legislative council; and relating to the membership of the Legislative Budget and Audit Committee.
Out of committeeCOSPONSOR(S): MCCABE · 2026-05-07
Permanent Fund Investments
An Act relating to investments of the permanent fund; relating to investments made by the Alaska Permanent Fund Corporation; relating to regulations adopted by the Alaska Permanent Fund Corporation; and providing for an effective date.
Not out of committeeCOSPONSOR(S): TOMASZEWSKI · 2026-04-16
Personal Finance Program In Schools
An Act establishing a personal finance education program for public schools; and providing for an effective date.
Not out of committeeREFERRED TO EDUCATION · 2026-02-23
Retirement Savings Program
An Act establishing the Alaska Work and Save Program for employees who do not have access to a qualified retirement savings plan at work; relating to the duties of the commissioner of labor and workforce development; and providing for an effective date.
Not out of committeeREFERRED TO LABOR & COMMERCE · 2026-02-23
State Apprenticeshp Office; Council
An Act relating to apprenticeship programs; establishing a state apprenticeship office; and establishing the Alaska Apprenticeship Advisory Council.
Not out of committeeREFERRED TO LABOR & COMMERCE · 2026-02-23
License Plates: United States 250th Ann.
An Act relating to special registration plates commemorating the 250th anniversary of the United States of America; and providing for an effective date.
Not out of committeeREFERRED TO STATE AFFAIRS · 2026-02-16
Career/tech Education Tax Credit
An Act relating to a tax credit for career and technical education; and providing for an effective date.
Not out of committeeREFERRED TO LABOR & COMMERCE · 2025-05-07
“In plain English” lines are written by ThePolitibase with AI (Claude), from the official synopsis only; the synopsis is the authoritative text. Descriptions are the legislature’s own synopsis. Bill data from LegiScan, CC BY 4.0.
Loading committees…
HB381 · 2026-07-16
Oil & Gas Property Tax; Muni Tax; Agdc (House: Adopt)
HB381 · 2026-06-20
Oil & Gas Property Tax; Muni Tax; Agdc (House: Concur)
HCR302 · 2026-06-20
Authorizing A Recess Longer Than 3 Days (House: Second Reading)
HCR301 · 2026-06-20
Carry-over Of Bills To Spec Session (House: Second Reading)
HB314 · 2026-06-19
Arch, Eng, Surveyors; Reg Int Design (House: Veto Override)
HB381 · 2026-06-12
Oil & Gas Property Tax; Muni Tax; Agdc (House: Second Reading Amendment No. 2)
HB381 · 2026-06-12
Oil & Gas Property Tax; Muni Tax; Agdc (House: Third Reading Final Passage)
HB381 · 2026-06-12
Oil & Gas Property Tax; Muni Tax; Agdc (House: Second Reading Amendment No. 2)
SCR201 · 2026-05-21
Authorizing A Recess Longer Than 3 Days (House: Final Passage)
SCR202 · 2026-05-21
Carry-over Of Bills To Spec Session (House: Final Passage)
HB239 · 2026-05-20
Crime/cntrl Subst/address Confidentiality (House: Concur)
HB16 · 2026-05-20
Campaign Finance;contribution Limits;apoc (House: Concur)
HB16 · 2026-05-20
Campaign Finance;contribution Limits;apoc (House: Effective Date Concur)
HB126 · 2026-05-20
Reinstatement Native Corps/ancsa Reports (House: Concur)
HB278 · 2026-05-20
Economic Dev:ak-ireland Trade Comm. (House: Concur)
HB28 · 2026-05-20
Edu: Schools/teachers/school Bd/loan Prgm (House: Concur)
SB79 · 2026-05-20
Payment Of Wages; Payroll Card Account (House: Second Reading Adopt Finance HCS)
SB79 · 2026-05-20
Payment Of Wages; Payroll Card Account (House: Third Reading Final Passage)
SCR22 · 2026-05-20
Suspend Uniform Rules For Hb 239 (House: Second Reading Final Passage Special Order of Business)
SCR13 · 2026-05-20
Suspend Uniform Rules For Hb 126 (House: Second Reading Final Passage Special Order of Business)
SCR21 · 2026-05-20
Suspend Uniform Rules For Hb 28 (House: Second Reading Final Passage Special Order of Business)
HB173 · 2026-05-20
Lic.: Occup/phys Therapy;speech;audiology (House: Concur)
HB110 · 2026-05-20
Health Care/licensure Compacts/social Wrk (House: Concur)
HB13 · 2026-05-20
Municipal Property Tax Exemptions; Refund (House: Concur)
HB13 · 2026-05-20
Municipal Property Tax Exemptions; Refund (House: Concur)
SCR18 · 2026-05-20
Suspend Uniform Rules For Hjr 18 (House: Second Reading Final Passage Special Order of Business)
SCR36 · 2026-05-20
Suspend Uniform Rules For Hb 14 (House: Second Reading Final Passage Special Order of Business)
SCR16 · 2026-05-20
Suspend Uniform Rules For Hcr 4 (House: Second Reading Final Passage Special Order of Business)
SB258 · 2026-05-20
Contract: Licensing Software Applications (House: Third Reading Final Passage)
SCR28 · 2026-05-20
Suspend Uniform Rules For Hb 302 (House: Second Reading Final Passage Special Order of Business)
HB302 · 2026-05-20
Travel Insurance; Unemployment Benefits (House: Concur)
SCR27 · 2026-05-20
Suspend Uniform Rules For Hb 173 (House: Second Reading Final Passage Special Order of Business)
HB280 · 2026-05-20
Apportion Taxable Income (House: Concur)
HCR4 · 2026-05-20
Myositis Awareness Month (House: Concur)
SCR25 · 2026-05-20
Suspend Uniform Rules For Hb 110 (House: Second Reading Final Passage Special Order of Business)
SCR14 · 2026-05-20
Suspend Uniform Rules For Hb 13 (House: Special Order of Business)
HB73 · 2026-05-20
Complex Care Residential Homes (House: Concur)
HB14 · 2026-05-20
Med Assist;insurance;disability/work Comp (House: Concur)
SB164 · 2026-05-20
Eliminate Tax Discounts (House: Third Reading Final Passage)
SB164 · 2026-05-20
Eliminate Tax Discounts (House: Third Reading Effective Date)
HJR18 · 2026-05-20
Urging Support For Natural Gas Project (House: Concur)
SB252 · 2026-05-20
Ucc: Secured Trans.; Electronic Records (House: Third Reading Final Passage)
SB163 · 2026-05-20
Repeal Certain Inactive Funds/accounts (House: Third Reading Final Passage)
SB167 · 2026-05-19
Pfd Eligibility; Pfd For Overturn Convic. (House: Second Reading Amendment No. 1)
SB200 · 2026-05-19
Muni: Svc Areas; Farm & Agricultural Land (House: Third Reading Final Passage)
SB23 · 2026-05-19
Civics Education (House: Third Reading Final Passage)
HB265 · 2026-05-19
Approp: Mental Health Budget (House: Adopt)
SB146 · 2026-05-19
Reaa & Small Muni Fund: Mt. Edgecumbe (House: Third Reading Final Passage)
SB180 · 2026-05-19
Lng Import Facilities (House: Second Reading Move to bottom of the calendar)
SJR20 · 2026-05-19
Clean Up Marine Debris (House: Third Reading Final Passage)
HB79 · 2026-05-19
Vic Fischer Marine Park; Research Program (House: Concur)
HB133 · 2026-05-19
Payment Of Contracts (House: Concur)
HCR32 · 2026-05-19
Suspend Uniform Rules For Sb 24 (House: Second Reading Final Passage Special Order of Business)
HCR29 · 2026-05-19
Suspend Uniform Rules For Sb 239 (House: Second Reading Final Passage Special Order of Business)
HCR30 · 2026-05-19
Suspend Uniform Rules For Sb 211 (House: Second Reading Final Passage Special Order of Business)
HB263 · 2026-05-19
Approp: Operating Budget;funds;supp (House: Adopt)
HB263 · 2026-05-19
Approp: Operating Budget;funds;supp (House: Adopt Effective Date)
Complete voting record from LegiScan (showing the 60 most recent of 717 total roll-call votes this session).
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