All-American Showcase is a double album of music by four American composers performed by the Anglo-Italian conductor, Mantovani and His Orchestra. It was released in 1959 by London Recordings (catalog nos. PSA 3202 and LL 3122/3). Each of the four sides is dedicated to one of four composers: Sigmund Romberg, Victor Herbert, Irving Berlin, and Rudolf Friml. It debuted on Billboard magazine's pop album chart on January 4, 1960, peaked at the No. 8 spot, and remained on the chart for 18 weeks. AllMusic later gave it a rating of three stars.