Cadet Creek is a stream in northwestern Osage County in the U.S. state of Missouri. It is a tributary of the Osage River.
The stream headwaters arise in northwest Osage County at and an elevation of about . The stream flows southwest and west to its confluence with the Osage at at an elevation of . The confluence is about 1.5 miles south of Osage City.
Cadet Creek has the name of the local Cadet family.