Liusena

thumb|upright=1.3|The Lučans on a map of historiographically abandoned Bohemians (tribe)#Hypothesis about the Czech tribes|hypothesis about the Czech tribes.

The Lučans () were one of the legendary Czech tribes that lived before the establishment of the Duchy of Bohemia in the region called Lucko, with its center in Žatec. They are known mainly from the legend of the Lučan War. They may have existed in the 9th to the 10th century, and possibly survived until the 12th century.