A polo shirt, tennis shirt, golf shirt, or chukker shirt is a form of shirt with a collar. Polo shirts are usually short sleeved but can be long; they were used by Polo players originally in India in 1859 and in Great Britain during the 1920s.

Polo shirts are usually made of knitted cotton rather than woven cloth, usually a Piqué knit, or less commonly an interloc knit (the latter used frequently, though not exclusively, with Pima Cotton Polos), or using other fibers such as Silk, wool, synthetic fibers, or blends of natural and synthetic fibers. A dress -length version of the shirt is called a polo dress.