Illinois 154 is an east-west route in southwestern Illinois, stretching from IL3 at Red Bud to the I-57 corridor.
Intersections from west to east:
IL154 begins at its western endpoint at IL3 at Red Bud. This is also the southern endpoint of IL159.
IL4 at Sparta
IL153 at Eden
IL13 joins from the west approaching Pinckneyville
IL154 crosses IL127 as IL13 joins that route south, leaving IL154 no longer multiplexed
IL154 joins IL148 northward for a short distance
IL154 breaks off of IL148 at Sesser
IL154 ends just past I-57 at IL37 near Whittington.
It passes through these towns: Red Bud, Baldwin, Sparta, Eden, Pinckneyville, and Sesser.