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Meet Sid

Sidney Mathias is a Lake County Board Member and Lake County Forest Preserves Commissioner from Buffalo Grove.

As a Member of the Lake County Board since filling a vacancy in 2014, Mathias represents District 20 which includes Buffalo Grove, portions of Long Grove, and portions of the unincorporated areas of Vernon and Ela Townships.

On the county board, Mathias has been a champion for transparency, fighting for more accountable and responsible government. As Vice-Chair of the Ethics and Oversight Committee, he helps enforce Lake County’s ethics and standards of conduct ordinances for elected and appointed officials. During his time as Village President of Buffalo Grove, Mathias was the first mayor to televise all Village Board meetings to increase transparency within the community.

Mathias has been a leader on transportation issues his entire career. Among his greatest accomplishments are bringing the North Central Commuter Railroad to Buffalo Grove and securing a second track, leading to the honor of the station being named the “Sidney H. Mathias Metra Train Station.” He also led the fight to save public transportation in the suburbs, reforming the RTA and keeping CTA, Metra and Pace in service. As a Member of the Public Works and Transportation Committee for the county board, he advocates for transportation investments throughout the county, including the extension of Route 53 into Lake County.

As a leader on the county board thanks to his lifetime of experience and service, Mathias has been a strong voice for fiscal responsibility. He actively supports efforts to make Lake County government more efficient with the public’s tax dollars, ensuring that the county continues to deliver balanced budgets and innovative services. As a result, Lake County is one of a small number of counties in the country that boasts a AAA bond rating, the highest possible credit rating.

Mathias is deeply invested in maintaining the county’s forest preserves and preserving open space as a Forest Preserve Commissioner. He serves as Vice-Chair of the Planning Committee and Chair of the Diversity & Cultural Awareness Committee. He also counts economic development and job creation among his most important priorities, bringing good-paying jobs and opportunities to the 20th District and all of Lake County.

Prior to his public service on the Lake County Board, Mathias was elected State Representative from 1999 to 2013. He also served as Village President and Trustee of Buffalo Grove, President of the Northwest Suburban Municipal Conference, and an Officer for the Lake County Municipal League.

A Buffalo Grove resident since 1979, service to his community runs in Mathias’ blood. Among his many community service positions, he volunteers as President of Congregation Beth Judea in Long Grove, a Board Member for the Jewish Federation of Metropolitan Chicago, a Docent at the Illinois Holocaust Museum and Education Center, a Member of the Illinois Child Support Advisory Committee, and a Commissioner on the Illinois Holocaust and Genocide Commission.

Mathias, a retired attorney who practiced law for nearly fifty years, earned his law degree from DePaul University and his bachelor’s degree from Roosevelt University. He has been married to his wife, Rita, for forty-six years. Rita is a retired teacher who taught in School Districts 102 and 96. They have two sons, both rabbis, and eight grandchildren.



Paid for by the Citizens for Sidney Mathias. A copy of our report filed with the State Board of Elections is (or will be) available on the Board's official website ( or for purchase from the State Board of Elections, Springfield, Illinois.
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