The fibula is located lateral to the tibia. In overall anatomical position, the tibia is medial in the body, and the tibia lateral. Both are located in the lower leg. The tibia articulates with the patella proximally, the fibula laterally, and the talus distally.
The fibula, also called the calf bone, is located on the lower leg. It is the slenderest of all the long bones. Without a fibula, one can't walk properly because the lower leg will not be stable. This is why the fibula is very important to the human body.