Rock balancing or stone balancing (stone or rock stacking) is an art, discipline, or hobby in which rocks are naturally balanced on top of one another in various positions without the use of adhesives, wires, supports, rings or any other contraptions which would help maintain the construction's balance.

Balancing rocks are truly stellar (and indeed interstellar) features that attract tourists, geologists, and increasingly, artists. A balancing rock is a naturally occurring geological formation featuring a large rock or boulder, sometimes of substantial size, resting on other rocks that often look precariously balanced. In reality, these rocks only appear to be balancing but are in fact firmly connected to a base rock by a pedestal or stem.