Cook County, Illinois

Cook County Commissioner District 15

2 candidates are tracked for Cook County Commissioner District 15 on the November 3, 2026 ballot: Ted Mason and Daniel Lee. Candidate information follows official Cook County election filings; verify with the official election office linked below.

About this race

On Cook County's November 3, 2026 general election ballot, per the Cook County Clerk's official candidate filing list. This is a single-member seat; only voters in the district vote.

What this office does

County commissioner. The county board is the county's legislative and, in most states, executive body. Commissioners adopt the county budget and property tax rate, oversee roads, the jail, public health, planning and zoning in unincorporated areas, and appoint or confirm department heads. In counties with an elected county executive or judge, the board's role is mainly the budget and ordinances.

Illinois › Cook County › Cook County Commissioner District 15

Ted Mason

Democratic

Top priorities

Expanding access to mental health care
Bringing resources to small businesses in the northwest suburbs
Providing Cook County with balanced budgets

Per the campaign site.

Biography

Mason has spent about 15 years in public service, beginning in then State Senator Toi Hutchinson's office before serving as director of outreach for a member of Congress, per the campaign site. Since 2018 he has been chief of staff to Cook County Commissioner Kevin Morrison, and he has served as Elk Grove Township Democratic Committeeperson since 2014, per the campaign site. He graduated from Conant High School and holds a bachelor's and a master's degree in political science and government from Illinois State University, per the campaign site.

Campaign site (opens in a new tab)

Daniel Lee

Republican

Top priorities

conservative values
fiscal responsibility
common sense leadership

Per the campaign site.

Biography

Lee is a small business owner and 30 year Cook County resident who serves as a commissioner on the Village of Hoffman Estates' Economic Development Commission and Planning and Zoning Commission, per the campaign site. He describes his approach as bringing common sense and fiscal responsibility to government, drawing on his experience running a business, per the campaign site. He is active in his church, Scout Troop leadership, the Lions Club and the Jaycees, per the campaign site.

Campaign site (opens in a new tab)

Next on your ballotCook County Commissioner District 16

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Voting info and more

Questions about this race

Who is running for Cook County Commissioner District 15 in 2026?

When is the Cook County Commissioner District 15 election in Illinois?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Illinois are on the Illinois election hub at theballotbrief.com.

How do I see my exact Cook County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official Cook County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Illinois election office, or see the full Cook County sample ballot and your exact ballot by address.

The rest of your Cook County ballot

135 tracked races in Cook County, Illinois. Landed here from another county's search? Look up your own ballot below.

Also on your ballot

Cook County Commissioner District 17 Metropolitan Water Reclamation District Commissioner (Six Year Term)Metropolitan Water Reclamation District Commissioner (Two Year Term)See all 135 Cook County races

Candidate profiles

Ted Mason, full profile Daniel Lee, full profile Official Illinois election office