Pliny may refer to:

• Pliny the Elder (23–79 CE), ancient Roman nobleman, scientist, historian, and author of Naturalis Historia (Pliny's Natural History)
• Pliny the Younger (died 113), ancient Roman statesman, orator, writer, and Pliny the Elder's nephew and adopted son
• Pliny Chase (1820–1886), American scientist, mathematician, and educator
• Pliny Earle (disambiguation), several people
• Pliny Fisk III (born 1944), co-founder and co-director of the Center for Maximum Potential Building Systems (CMPBS)
• Pliny Earle Goddard (1869–1928), American linguist and ethnologist
• Pliny Norcross (1838–1915), Wisconsin politician
• Pliny W. Williamson (1876–1958), New York politician

• Pliny, West Virginia, United States
• Pliny Township, Minnesota, United States

• Pliny the Elder, the flagship beer of the Russian River Brewing Company
• Pliny the Younger (beer), a seasonal (February) beer of the Russian River Brewing Company

• Plinia, a genus of the botanical family Myrtaceae
• Plinian eruption, a type of volcanic eruption similar to AD 79 eruption of Mount Vesuvius
• Plinio (disambiguation)
• Plinius (crater), a lunar impact crater
• PLINIVS, a 2013 manga biography of Pliny the Elder