Karel Petrus Cornelis de Bazel (Den Helder, 14 February 1869—Amsterdam, 28 November 1923) was a modern Dutch architect, engraver, draftsman, furniture designer, carpet designer, glass artist and bookbinding designer.
He was the teacher of Adriaan Frederik van der Weij and the first chairman of the Bond van Nederlandse Architecten (BNA; the Association of Dutch Architects), beginning in 1909.