Katherine FitzGerald

• Katherine FitzGerald, [Countess of Desmond], noblewoman of the Anglo-Norman FitzGerald dynasty in Ireland
• Katherine FitzGerald, [Viscountess Grandison], wealthy Irish heiress
• Katherine A. Fitzgerald, Irish-born molecular biologist and virologist
• Katherine [Fitzgerald, Lady of Hy-Carbery], Anglo-Irish noblewoman