The longa is a musical note twice as long in duration as a breve (i.e., lasting four entire measures). It is found mostly in older music, particularly chant. It is drawn as a breve with a short staff extending down from it.

Longa is also the name of a town in Angola.

Longa (Greek: Λόγγα) is also a place in Messenia in Greece, located between Petalidi and Koroni .