The 1985 Virginia Slims of Chicago was a women's tennis tournament played on indoor carpet courts at the UIC Pavilion in Chicago, Illinois in the United States and was part of the Category 3 tier of the 1985 WTA Tour. It was the 14th edition of the tournament and was held from September 16 through September 22, 1985. Fifth-seeded Bonnie Gadusek won the singles title and earned $27,000 first-prize money.
Finals
Singles
Bonnie Gadusek defeated Kathy Rinaldi 6–1, 6–3
It was Gadusek's 3rd singles title of the year and the 4th of her career.
Doubles
Kathy Jordan / Elizabeth Smylie defeated Elise Burgin / JoAnne Russell 6–2, 6–2