Wills Branch is a stream in Madison and St. Francois counties in the U.S. state of Missouri.
[2] The stream headwaters arise in St. Francois County at 37°42′08″N 90°20′46″W / 37.70222°N 90.34611°W / 37.70222; -90.34611[1] at an elevation of approximately 1,060 ft (320 m).
The stream flows south-southeast passing under Missouri Route DD two miles northeast of Knob Lick.
It is impounded as Nims Lake on the St Francois-Madison county line and enters the Little St. Francis River in Madison County approximately three-quarters of a mile southeast of the Nims Lake dam.
[1] Wills Branch has the name of a black settler in the area.