Firth (disambiguation)

• Firth
• Firth (surname)
• Firth Park (ward)
• Firth of Fifth
• Firth of Forth
• Firth, Idaho
• Firth, Nebraska
• Firth, Orkney
• Firth, Pond & Company
• Firth, Shetland
• Frith
• John Rupert Firth
• Vic Firth