Jack Hennessy

Jack Hennessy may refer to:

• John Francis Hennessy (1853–1924), Australian architect
• John Francis (Jack) Hennessy (1887–1955), his son, Australian architect
• John M. Hennessy, American financier and philanthropist
• Jack Hennessy (politician) (1951–2024), member of the Connecticut House of Representatives

See also

• Jackie Hennessy, Irish footballer