Knell is a surname, and may refer to:
Eric Knell (1903–1987), English Anglican Bishop Gary Knell (born 1954), American broadcast executive Phil Knell (1865–1944), American baseball player Wiebke Knell (born 1981), German politician William Knell (actor) (d 1587), Elizabethan English actor William Adolphus Knell (1801–1875), British maritime painter William Calcott Knell (1830–1880), British landscape painter
A knell is also the sound of a bell when being rung for a funeral: Death knell