The Jumping Frog of Calaveras County is an English language American comic opera in one act and two scenes.

It was composed by Lukas Foss with a libretto by Jean Karsavina, based Mark Twain's 1865 short story "The Celebrated Jumping Frog of Calaveras County".

[8] Smiley brags of the talents of his jumping frog, Dan'l Webster, to Uncle Henry and his niece Lulu.

When the Stranger doubts Daniel's abilities, Smiley bets $40 that Dan'l can best any other frog in Calaveras County.

[11] The New York City premiere followed three weeks later when the After Dinner Opera Company performed it on June 7, 1950, at the Master Theatre, Riverside Drive at 103rd Street.

[13][15][16] Cecil Smith said of the performance "its tone essentially seems to be that of early Kurt Weill and the other Central European composers who became fascinated with American popular idiom.

While Foss writes more like an American than Weill, a dry cynicism often creeps into the score and removes it in mood from the ambling colloquialism of Mark Twain's story.

"[13] Foss conducted a performance at the Berkshire Music Festival at Tanglewood on July 30, 1950; the director was Sarah Caldwell.

[25] The After Dinner Opera Company in 1951 released a recording on Lyrichord Discs without an orchestra and only a piano accompaniment by Frederic Kurzweil.

[30] The Manhattan Chamber Orchestra in October 1996 recorded Jumping Frog at the Church of the Epiphany in New York City, released the next year on the Newport Classic label.

[31] A review in the Deseret News praised conductor Richard Auldon Clark for "keep[ing] things hopping, his singers likewise leaping into their roles with polish and enthusiasm" and Foss's music, particularly the opera's overture, "with its Appalachian Spring-like flavor".

[32] Another review of the recording was exuberant in praise: "By the first scene, however, Foss has plunked himself down in the mining camp (at least as a tourist), and the interest–particularly the rhythmic interest–picks up.