Decider may refer to:

• The Decider, a stand-up comedy special
• Machine that always halts, a type of Turing machine
• "The Decider," a recurring segment on The Daily Show
• "The Decider," an issue of Tales of the Teenage Mutant Ninja Turtles
• Decider.com, a pop culture website operated by the New York Post
• Posek (Hebrew for "decider"), a type of Jewish legal scholar
• Roger from American Dad!

• PORT.rs
• Portrunny
• Portrush Primary School
• Por Trás do Pano
• Ports Act 1991
• Port Safaga
• Port Said chronology
• Port Said football clashes
• Port Said football match disaster
• Port Said Hall
• Port Said Martyrs Memorial
• Port Said massacre
• Port Said Stadium clashes
• Port Said Stadium disaster
• Port Said Stadium massacre
• Port Said Stadium riot
• Port Saint Joe High School
• Port Saint Johns
• Port Saint Johns, Eastern Cape
• Port-Saint-Père-Saint-Mars railway station
• Port Salford
• Port-salut
• Port Salut (cheese)
• Port-Salut (cheese)
• Port-salut (cheese)