Lyžbice (Polish: Łyżbice , German: Lischbitz) is a part of the town of Třinec in Frýdek-Místek District, Moravian-Silesian Region, Czech Republic, on the Olza River. It was a separate municipality but later became administratively a part of the town of Třinec. It lies in the historical region of Cieszyn Silesia and has a population of 17,239 (1 January 2008).
The name is of patronymic origins derived from personal name *Łyżba.
The village was first mentioned in 1562 as Lyzbycz. It belonged then to the Duchy of Teschen, a fee of the Kingdom of Bohemia and a part of the Habsburg Monarchy.
The village with Nýdek was bought from Joseph Freyherrn von Beess by Teschener Kammer in 1792 for 46,000 florins.