CFK may refer to:

• Carolina for Kibera
• Chemische Fabrik Kalk, a former German chemical company
• Chefornak Airport, Alaska, US, FAA LID code
• Cristina Fernández de Kirchner, President of Argentina from 2007 to 2015
• Carbonfaserverstärkte Kunststoffe (CFK or CFvK), which translates to carbon fiber reinforced polymer (CFRP)

• Culeg Vise
• Culemborg railway station
• Culemeyer
• Culemeyer heavy trailer
• Culenco River
• Culero
• Culetre
• Culex americanus
• Culex annulirostris
• Culex pipiens
• Culex (Poem)
• Culex quinquefasciatus
• Culex restuans
• Culex tarsalis
• Culfa District
• Culford, Suffolk
• Culgaith
• Culgoa
• Culgoa County, New South Wales
• Cul green
• Culham Bridge
• Culham Inlet
• Culham Manor
• Culhat
• Culiacan Municipality