Nathaniel George Booker, 37, faces a misdemeanor count of driving under the influence of alcohol and was cited for obstructing drivers on a highway, Chicago police said.
Officers found him asleep and his car blocking traffic in the middle outbound lane around 1:30 a.m. Friday near Halsted Street, police said.
Booker was elected mayor of Maywood last year after serving as a village trustee for two years.
He posted a message to his Facebook account quoting the Bible and a pastor that read, in part: "The Lord will turn your mistakes into a Miracle. He wont erase it, he will work through it. One piece of your life does not define your life."
Booker was released from custody without posting a bond.