Lost Creek (Cedar Creek tributary)

Lost Creek is a stream in Washington County in the U.S. state of Missouri. It is a tributary of Cedar Creek.

The stream headwaters are in the southeastern corner of Washington County at 37°44′44″N 90°39′35″W / 37.74556°N 90.65972°W / 37.74556; -90.65972 and it flows west and then north passing under Missouri Route 32 to its confluence with Cedar Creek at 37°47′04″N 90°44′06″W / 37.78444°N 90.73500°W / 37.78444; -90.73500 approximately two miles northeast of Caledonia.

Lost Creek was named for the fact it is a losing stream or subterranean stream along parts of its course.