Lost Creek is a stream in DeKalb and Gentry counties in the U.S. state of Missouri.It is a tributary of Grindstone Creek.
The stream headwaters are at 40.1028°N -94.4808°W and the confluence with Grindstone Creek is at 39.8861°N -94.2406°W.
According to tradition, the creek was named for an incident when a party of soldiers were lost during a blizzard near the creek.[1]