The Basel Boys Choir (Knabenkantorei Basel [KKB]) is a boys' choir based in Basel, Switzerland; it grew out of the boys' choir of the Protestant Church of Basel-City, founded by Hermann Ulbrich in 1927. Today the choir is non-denominational. They sing both sacred and secular works. The choir has been under the leadership of Oliver Rudin since 2017.

In addition, the choir has been invited to participate in important music festivals, including the Lucerne Festival under James Conlon, Mario Venzago, Riccardo Chailly and Mariss Jansons, the European Music Festival in Berlin under Roland Bader, the International Festival of Boys Choirs in Poznań (Poland), as well as festivals in Nancy, Maastricht, Venice, Basel, and the Schubert Choir Festival in Vienna in 1997. The Basel Boys Choir is also the host choir of the well-known and highly successful European Festival of Youth Choirs (Europäisches Jugendchorfestival, EJCF).