- SKC (Selkirk Crew)
- SKCC (Sidney Kimmel Cancer Center)
- SKCM (Master Chief StoreKeeper)
- SKCS (Senior Chief Storekeeper)
- SKCV (Street Kids Community Villages)
- SKD (Schedule)
- SKE (Skien Airport, Geiteryggen)
- SKF (Lackland Air Force Base / Kelly Field Annex)
- SKFE (Super-Kill Fire ant Exterminator)
- SKG (Makedonia Airport)
- SKH (Shoot, Kill, Hack)
- SKI (Skikda Airport)
- SKIL (Stanford's Key to Information Literacy)
- SKIN (Share Knowledge, Inspire, Nurture)
- SKIP (Special Kids, Involved Parents)
- SKIPPER (Shaking Kills, Instead, Parents Please Educate and Remember)
- SKI-USF (Shotokan Karate International-United States Federation)
- SKK (Shaktoolik Airport (FAA: 2C7))
- SKL (Systems Knowledge Link)
- SKM (Seltzer Kaufmann Marketing)
- SKN (Stokmarknes Airport, Skagen)
- SKO (Samaratins, KELY, and Outward Bound Hong Kong)
- SKOT (Sredni Kolowy Opancerzny Transporter (armoured personnel carrier))
