Splay may refer to:

• Splay, a verb meaning slant, slope or spread outwards
• Splay (physiology), the difference between urine threshold and saturation
• Splay (Japanese band), a J-pop band from Osaka
• Splay Networks, a Sweden-headquartered group of multi-channel networks for Sweden, Finland, Norway, Denmark, and Germany
• In architecture
  • splayed opening, an opening in the wall that broadens on one side
  • chamfer, a beveled edge connecting two surfaces
  • talus (fortification), a sloping face at the base of a fortified wall
• Splay (plastics), off-colored streaking that occurs in injection molded plastics
• Splay tree, a type of search tree
• Splay fault, geology
• Splay leg, a condition in birds and poultry
• Splay (Shiner album), 1996
• Splay (Jim Black album), 2002