William James "Count" Basie was an American jazz pianist, organist, bandleader, and composer. In 1935, he formed the Count Basie Orchestra, and in 1936 took them to Chicago for a long engagement and their first recording. He led the group for almost 50 years, creating innovations like the use of two "split" tenor saxophones, emphasizing the rhythm section, riffing with a big band, using arrangers to broaden their sound, and others. Many musicians came to prominence under his direction, including the tenor saxophonists Lester Young and Herschel Evans, the guitarist Freddie Green, trumpeters Buck Clayton and Harry "Sweets" Edison, plunger trombonist Al Grey, and singers Jimmy Rushing, Helen Humes, Thelma Carpenter, and Joe Williams.

The Count Basie Orchestra is a 16- to 18-piece big band, one of the most prominent jazz performing groups of the swing era, founded by Count Basie in 1935 and recording regularly from 1936. Despite a brief disbandment at the beginning of the 1950s, the band survived long past the big band era itself and the death of Basie in 1984. It continues under the direction of trumpeter Scotty Barnhart.