Peth may refer to:

• Peths in Pune, places (peths) in Pune, India
  • Kasba Peth
  • Budhwar Peth
• Peth Islampur, a village in Sangli district, Maharashtra, India
• Peth taluka, a taluka in Nashik district, Maharashtra State, India
• Peth, Dahanu, a village in Maharashtra, India
• Astrid Peth, a character played by Kylie Minogue on Dr. Who
• Phosphatidylethanol
• Peristimulus time histogram, sometimes called pre-event time histogram or PETH
• The Peth, a band formed in 2008 by drummer Dafydd Ieuan