UCK

UCK may refer to:


 * Ubuntu Customization Kit, for a live CD of the Ubuntu operating system
 * Uckfield railway station, East Sussex, England
 * Kosovo Liberation Army (KLA; Ushtria Çlirimtare e Kosovës, UÇK)
 * National Liberation Army (NLA; Ushtria Çlirimtare Kombëtare, UÇK)