William Dennis (disambiguation)
# William Dennis (disambiguation)

William Dennis (1856–1920) was an Independent Conservative member of the Senate of Canada.

William or Billy Dennis may also refer to:

* Billy Dennis (English footballer) (1896–1952), English footballer
* Willie Dennis (1926–1965), American jazz musician
* Willie D (born 1966), rapper
* Bill Dennis (born 1935), NASCAR driver
* William Lockyer Dennis (1853–1919), English-born American politician
* William M. Dennis (1810–1882), American businessman and politician
* William S. Dennis (fl. 1910s), American captain of the Vanitie yacht in the America's Cup trials
* Will Dennis (born 2000), English footballer
