Which human joint is the largest by surface area?

The knee is widely regarded as the largest joint in the human body. It connects the femur, tibia, and patella and functions mainly as a hinge, although it has some rotational movement too. The knee bears much of the body’s weight during standing, walking, running, and jumping. Its complexity makes it vulnerable to ligament, cartilage, and meniscus injuries. As a result, knee health is central to mobility across the lifespan.