M15 motorway may refer to:

• M15 motorway (Great Britain), an upgrade of the A406 North Circular Road that was planned in the 1960s-70s but never built
• M15 motorway (Hungary), a road connecting the M1 and the Slovakian border

• The Friars Prologue
• The Friar's Prologue
• The Friar's Prologue and Tale
• The Friars Tale
• The Friars (Tasmania)
• The Friary
• The Friary high school.
• The Friary School
• The Frick Art and Historical Center
• The Frick Art & Historical Center
• The Friday Night Boys
• The Friday Night Project
• The Fried Chicken Flu
• The friedman doctrine
• The Friedman Foundation for Educational Choice
• The friedman foundation for school choice
• The Friend (Frasier)
• The Friend (Frasier episode)
• The Friendly Frontier
• The Friendly Indians
• The Friendly Monster
• The Friend (magazine)
• The Friend of the Jaguar
• The Friends and Workers
• The Friendship Algorithm