Mundelein is located in northeastern Illinois in Lake County north-northwest of Chicago along Interstate 94 about 10 miles inland from Lake Michigan. The population estimate for July 1, 1998 was 28,518, an increase of 7,294 since 1990.
One of the highlights of summer is the "Mundelein Community Days", a week-long celebration culminating with the 4th of July weekend.
For those seeking education beyond the high school level, the town is home to University of Saint Mary of the Lake, a four-year institution of higher learning.