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 37.74556°N, -90.65972°W and it flows west and then north passing under Missouri Route 32 to its confluence with Cedar Creek at 37.78444°N, -90.735°W 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.