Patrick Hennessy may refer to:
Sir Patrick Hennessy (industrialist) (1898–1981), Irish-born British industrialist Patrick Hennessy (journalist) (born 1963), British journalist Patrick Hennessy (painter) (1915–1980), Irish artist Patrick Hennessey (trade unionist), Irish trade unionist and political radical Patrick Hennessey (barrister) (born 1982), British barrister and author
See also Hennessy (surname) Hennessey (disambiguation)