Yodeling (or yodelling, jodeling) is a form of singing that involves singing an extended note which rapidly and repeatedly changes in pitch from the vocal or chest register (or "chest voice") to the falsetto/head register; making a high-low-high-low sound. This vocal technique is used in many cultures throughout the world.

In Alpine folk music, it was probably developed in the Swiss Alps and Austrian Alps as a method of communication between mountain peaks, later becoming part of the region's traditional music. In Persian classical music, singers frequently use tahrir, a yodeling technique that oscillates on neighbor tones. In Georgian traditional music, yodelling takes the form of krimanchuli technique, and is used as a top part in three/four part polyphony. In Central Africa, Pygmy singers use yodels within their elaborate polyphonic singing, and the Shona people of Zimbabwe sometimes yodel while playing the mbira. Yodeling is often used in American bluegrass and country music. According to the Oxford English Dictionary the word yodel is derived from a German word jodeln (originally Bavarian) meaning "to utter the syllable jo."