Jakob Lenz is a one-act chamber opera by Wolfgang Rihm, written 1977–78 to a libretto by Michael Fröhling after Georg Büchner's 1836 novella Lenz which in turn is based on an incident in the life of the German poet Jakob Michael Reinhold Lenz (1751–1792).

[1] Rihm dedicated the opera to his teacher, Eugen Werner Velte [de].

[2] Rihm received for Jakob Lenz the Beethoven Prize of the city of Bonn in 1980.

It was first performed in the United States in 1981 at Indiana University and in New York at the Juilliard Theater in 1987.

It was directed by Sam Brown, and conducted by Alexander Ingram, with Andrew Shore in the leading role.