Kostyuk may refer to:

• Denys Kostyuk,Ukrainian bicycle racer
• Ihor Kostyuk, Ukrainian footballer
• Marta Kostyuk, Ukrainian tennis player
• Sergey Kostyuk, Ukrainian-born Kazakhstani footballer
• Serhiy Kostyuk, Ukrainian footballer
• Vasyl Kostyuk, Ukrainian footballer
• Vladimir Kostyuk, Turkmenistani footballer

• 85th (Bucks Volunteers) (King's Light Infantry) Regiment of Foot
• 85th Division (2nd Formation)(People's Republic of China)
• 85th Division (People's Republic of China)
• 85th Ferrying Squadron
• 85th Illinois Volunteer Infantry Regiment
• 85th Indianapolis 500
• 85th Indy 500
• 85th Infantry Regiment
• 85th New York Volunteer Infantry
• 85th Pennsylvania Infantry
• 85th Radio Squadron, Mobile
• 85th Readiness Division
• 85th Regiment
• 85th Regiment (disambiguation)
• 85th Regiment of Foot (Royal Volunteers)
• 85th Regiment of Foot (Westminster Volunteers)
• 85th Rifle Corps
• 85th Street – Forest Parkway (BMT Jamaica Line)
• 85th (Tees) Heavy Anti-Aircraft Regiment, Royal Artillery
• 85th Transport Squadron
• 85th United States Army Field Artillery Detachment
• 85 Ursae Majoris
• 85 U.S. 626
• 85W
• 85 Yards Through the Heart of the South