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Sidney Mathias
District 20
Lake County Board  

Sidney Mathias, District 20

Address: 18 N. County St., 10th Floor, Waukegan, IL 60085
Office Phone: 847.377.2300

Board member Mathias represents Lake County Buffalo Grove, portions of Long Grove and portions of the unincorporated areas of Vernon and Ela Townships. He was appointed to the board in 2014 to fill a vacancy. Member Mathias is a former state representative and Village of Buffalo Grove Village President, and a retired attorney. His priorities include the extension of IL Route 53 into Lake County, transportation, economic development and job creation, fiscal responsibility, and innovative, transparent, and efficient government management.

Elected Offices

  • Lake County Board Member (2014 – Present)
  • Lake County Forest Preserve Commissioner (2014 – Present)
  • State Representative, 53rd District (1999 -2013)
  • Village of Buffalo Grove President (1991 - 1999)
  • Village of Buffalo Grove Trustee (1988 - 1991)

Other Public Service

  • Former Member IL Route 53/120 Blue Ribbon Advisory Council
  • Former member, Buffalo Grove Zoning Board of Appeals (1983 – 1988)
  • Former Vice-Chair of the CATS Council of Mayors
  • Former President of the Northwest Suburban Municipal Conference
  • Former officer for the Lake County Municipal League
  • Former Chairman, North Central Service (Metra) Mayoral Task Force
  • Former Lake County Commissioner, Northeastern Illinois Planning Commission

Civic and Community Service

  • Board Member, Jewish Federation of Metropolitan Chicago
  • Member, Illinois Child Support Advisory Committee
  • Commissioner, Illinois Holocaust and Genocide Commission
  • Former Board Member, Buffalo Grove Chapter of the American Cancer Society


  • Bachelor of Science in Math, Roosevelt University
  • J.D. Law, DePaul University, College of Law

Personal and Other Information

  • Married to Rita for 42 years
  • Two children, seven grandchildren
  • Buffalo Grove resident since 1979

Lake County Committees


  • Public Works and Transportation
  • Revenue, Records and Legislation, Vice-Chair

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Lake County, Illinois
18 N. County Street
Waukegan, IL 60085
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County Board Office
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18 N. County St., 10th Floor
Waukegan, IL 60085-4351

Ph. 847.377.2300
Fx. 847.360.7322

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