SKX is a three-letter acronym that may stand for:

• Saransk Airport (IATA: SKX), an airport near Saransk, Russia
• Skyways (airline) (ICAO: SKX), a regional and domestic airline based in Linköping, Sweden
  • Avia Express (ICAO: SKX), a charter airline based in Stockholm, Sweden formerly associated with Skyways
• Taos Regional Airport (FAA LID: SKX), a public use airport near Taos, New Mexico, United States
• The NYSE stock symbol for American shoe company Skechers

• Argyllshire Mountain Battery, Royal Garrison Artillery
• Argyll's Rising
• Argynnia
• Argynnis anadyomene
• Argynnis clagia
• Argynnis clara
• Argynnis coreana
• Argynnis ella
• Argynnis emalea
• Argynnis iphigenia
• Argynnis midas
• Argynnis nerippe
• Argynnis ornatissima
• Argynnis penelope
• Argynnis perryi
• Argynnis sachalinensis
• Argynnis xanthodippe
• Argynnis zenobia
• Argynnus
• Argyns
• Argyra (Achaea)
• Argyra albicans
• Argyra argentina
• Argyra argyria
• Argyra atriceps