The sport and practice of single-handed sailing or solo sailing is sailing with only one crewmember. The term usually refers to ocean and long-distance sailing and is used in competitive sailing and among Cruisers.

Sailing employs the wind—acting on sails, wingsails or kites—to propel a craft on the surface of the water, on ice (iceboat) or on land over a chosen course, which is often part of a larger plan of navigation.