Vondell Brook is a stream in Mille Lacs County, in the U.S. state of Minnesota. It is a tributary of the Rum River.
The brook's headwaters are in a wetland in the city of Bock, Minnesota. It flows to Milaca, then into the Rum River approximately 2 miles (3.2 km) northeast of the city of Pease.
Vondell Brook bears the name of a local lumberman.
45°42′45″N 93°35′41″W / 45.71250°N 93.59472°W