William Fitzpatrick

William Fitzpatrick may refer to:


 * William H. Fitzpatrick (1865–1932), American Democratic Party official
 * William John Fitzpatrick (1830–1895), Irish historian
 * William P. Fitzpatrick (born 1961), Irish-American politician
 * William of Salisbury, 2nd Earl of Salisbury (died 1196), sometimes referred to as William fitz Patrick