Illinois 99 is a north-south route in Schuyler and Brown Counties in rural western Illinois.
Intersections from north to south:
IL99 begins at IL101 in northern Schuyler County
IL99 joins US24 east at Mt. Sterling
Shortly after, IL99 breaks off of US24
IL107 meets IL99 at the southern edge of Mt. Sterling
IL99 ends at IL104 near Meredosia.
It passes through these towns: Camden, Mt. Sterling, and Versailles.
