Route 124 is a highway in central Missouri. Its eastern terminus is at Route 22/151 in Centralia; its western terminus is at Route 240 east of Fayette.
Route 124 begins outside the small town of Fayette. About a half mile east of the town, and just passed Boone Femme Creek, Route 124 splits off of Route 240. After winding through a half mile of farmland, it intersects with the combined Routes H and HH. After two miles of farmland, Route 124 joins with Route A for one mile, before Route A splits off to the north.