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