Bear Branch is a stream in Iron and Reynolds counties in the U.S. state of Missouri. It is a tributary of the Black River.
The stream headwaters arise in Iron County at and the stream flows southwest to its confluence in Reynolds County with the Black River at . The source area for the stream is southwest of Annapolis and the stream flows parallel to Missouri Route K to join the Black at the north end of Clearwater Lake.
Bear Branch was named for the bears along its course.