Kitesurfing or kiteboarding is a surface water sport that uses wind power to pull a rider through the water on a small surfboard or a kiteboard (similar to a wakeboard). Generally kiteboarding refers to a style of riding known as freestyle or wake-style, whereas kitesurfing is more "wave-riding" oriented. These two styles usually require different boards and specific performance kites.

A kitesurfer or kiteboarder uses a board with or without foot-straps or bindings, combined with the power of a large controllable kite to propel himself and the board across the water. In 2006, the number of kitesurfers has been estimated at around 150,000 to 210,000, with 114,465 inflatable kites sold that same year.

The sport is becoming safer due to innovations in kite design, safety release systems, and instruction. Many riding styles have evolved to suit different types of riders and conditions, such as wakestyle, waveriding, freestyle, jumping, and cruising.