Charles Melvin ("Cootie") Williams (July 24, 1910 - September 15, 1985) was an American jazz and rhythm and blues trumpeter.
Williams rose to prominence as a member of Duke Ellington's orchestra, with which he performed from 1929 to 1940. He also recorded his own sessions during this time, both freelance and with other Ellington sidemen. In 1940 he joined Benny Goodman's orchestra, then in 1941 formed his own orchestra, in which over the years he employed Charlie Parker, Eddie "Lockjaw" Davis, Bud Powell, Eddie Vinson, and other important young players.
Cootie was renowned for his growling "jungle" style trumpet playing (in the tradition of trumpeter Bubber Miley and trombonist Joe "Tricky Sam" Nanton) and for his use of the plunger mute, and is reputed to have inspired Wynton Marsalis's use of it