PA15 may refer to:

• MAB PA-15 pistol
• Pennsylvania Route 15 (1920s)
• Pennsylvania's 15th congressional district
• Piper PA-15 Vagabond light aircraft
• U.S. Route 15 in Pennsylvania

• Arctosippa
• Arctosippa gracilis
• Arctosomma
• Arctosomma trochosiforme
• Arctostaphylos elegans
• Arctostaphylos rubescens
• Arctotis elegans
• Arctous
• ARC Training Centre for Automated Manufacture of Advanced Composites
• Arc Trial
• Arc trigonometric function
• Arc-trigonometric function
• Arc-trigonometric functions
• Arc Trooper
• Arctur-2
• Arcturian (disambiguation)
• Arcturian Mega-things
• Arcturus stream
• Arcuate ligament (disambiguation)
• Arcuate ligaments
• Arcuate limpet
• Arcuate nucleus of hypothalamus
• Arcuate pearly mussel
• Arcuatula
• Arcuatula perfragilis