Sidi Lexḍer (s tefrensist: Sidi Lakhdar) d yiwet tɣiwant n twialyt n Ɛin Ddefla, tezga-d ar 120 ikilumitren ar utaram n temdint n Lezzayer tamanaɣt. Deg 2008 ɣur-s azal n 20,970 imezdaɣ. Di lawan n temhersa tafrensist, llan ɣɣaren-as s yisem n Lavarande.