Lutsk (Ukrainian: Луцьк, translit. Luts'k, Pols: Łuck, Belaroushie: Луцак or Луцк, transliteratit Lutchak or Lutsk) is a ceety on the Styr River in northwastren Ukraine. It is the admeenistrative center o the Volyn Oblast (province) an the admeenistrative centre o the surroondin Lutskyi Raion (destrict) within the oblast. The ceety is an aa designatit as a raion o its ain within the oblast.
The estimatit population wis aroond 215,015 (as o 2013).