Kokle or historically kokles (kūkles) is a Latvian plucked string instrument (chordophone) belonging to the Baltic box zither family known as the Baltic psaltery along with Lithuanian kanklės, Estonian kannel, Finnish kantele, and Russian krylovidnye gusli. The first possible kokles related archaeological findings in the territory of modern Latvia are from the 13th century, while the first reliable written information about kokles playing comes from the beginning of the 17th century. The first known kokles tune was notated in 1891, but the first kokles recordings into gramophone records and movies were made in the 1930s. Both kokles and kokles playing are included in the Latvian Culture Canon.

Plucked string instruments are a subcategory of string instruments that are played by plucking the strings. Plucking is a way of pulling and releasing the string in such a way as to give it an impulse that causes the string to vibrate. Plucking can be done with either a finger or a plectrum.