About Michigan Capitol Guide

Michigan Capitol Guide is a free, independent directory of the Michigan State Capitol by Fifty Domes. Not affiliated with the Michigan Legislature, the Michigan House of Representatives, the Michigan State Senate or the Michigan Department of State.

About the data

Member and committee details are copied from public pages of the Michigan House of Representatives (house.mi.gov) and the Michigan State Senate (senate.michigan.gov), through Open States people data (CC0), checked against official legislature rosters. Each record shows its source address and copy date. Open States data last updated October 30, 2026. Neither Michigan Capitol Guide nor this information, as presented here, is endorsed by the Michigan House of Representatives or the Michigan State Senate. Registered lobbyists are on our sister site Michigan Lobby Guide. District lookups use the U.S. Census Bureau Geocoder. Corrections are welcome by email.

Bills, votes and hearings

The bills each member sponsors (on member pages) come from Open States bulk data (monthly PostgreSQL dump 2026-11-public.pgdump). Open States provides its data under a public domain dedication unless otherwise noted; attribution is appreciated, thank you, Open States / Plural Policy. Member-by-member roll-call votes and meetings are not in this guide yet. Official bill text and votes are on the Michigan Legislature's own site, house.mi.gov, and are not copied.

Legislator portraits (148) are hosted here; see photo credits.

Rankings, map and topics

Effectiveness on member pages is our own count from Open States bill actions and sponsors, using the Fifty Domes effectiveness formula (see the full rankings page): each bill or joint resolution a member is principal author of in their own chamber earns 1 point for passing committee, 2 more for passing the chamber, 2 more for passing both chambers and 5 more for becoming law; bills carried in the other chamber earn half of 1 (committee), 2 (both chambers) and 5 (law). Points are divided by the average for the member's chamber and majority or minority party, so 1.00 is typical. Closest allies counts bills and joint resolutions on which both members are principal author or coauthor. These are counts of bill progress, not judgments of a member's work; member-by-member roll-call votes are not in our data, so attendance, party unity and vote agreement are not shown. District minimaps on member pages use U.S. Census Bureau 2024 state legislative district boundaries (public domain), simplified. Topics and industries come from published keyword rules on bill titles; see topics and industries. Weekly summaries will be counted from the same bill actions, meetings and roll calls once the session convenes.