Frederick Trench

• Frederick Trench (MP for Galway), Irish MP for Galway County
• Frederick Trench (MP for Maryborough), Irish Member of Parliament
• Frederick Trench, 1st Baron Ashtown, Irish MP for Portarlington and Maryborough
• Frederick Trench, 2nd Baron Ashtown, his nephew, Irish peer
• Frederick Trench, 3rd Baron Ashtown, his grandson, Irish peer
• Frederick Trench (British Army officer), British soldier and Tory politician