Mark Spreitzer was sworn in as the State Senator for the 15th Senate District on January 3, 2023. He serves as the Senate Democratic Caucus Vice-Chair and as the Chair of the Legislative LGBTQ+ Caucus. 

Mark previously served as the State Representative for the 45th Assembly District from 2015-2023 and served as the Assembly Democratic Caucus Chair from 2016-2022. Prior to serving in the State Assembly, Mark served for four years on the Beloit City Council, including as Council President. 

Mark is an active member of the community and participates in nonprofit and community organizations, including serving as a Board Member of the Welty Environmental Center and on the Finance and Facilities Board of the United Church of Beloit.

Mark lives in Beloit with his husband Philip, their cat Otis, and their backyard chickens. In his free time, Mark enjoys the outdoors and attends events across the 15th Senate District. 

Senate Committees: 

• Committee on Agriculture & Tourism
• Committee on Financial Institutions and Sporting Heritage
• Committee on Housing, Rural Issues, and Forestry 
• Committee on Shared Revenue, Elections, and Consumer Protection
• Joint Legislative Council 
• Joint Committee on Information Policy and Technology
• Legislative Council Study Committee on Sandhill Cranes
• Board Member, Wisconsin Housing and Economic Development Authority (WHEDA)

Leadership Positions:

• State Senate Democratic Caucus Vice-Chair
• Wisconsin Legislative LGBTQ+ Caucus Chair