Saada (Larabci: صَعْدَة, romanized: Sa'da) babban birnin jihar Sa'ada ne a arewa maso yammacin Yemen a tsayin daka kusan mita 1,800. An kiyasta yawanta a cikin 2004 a 51,870. A da an san shi da Karna, masarautar tsohuwar daular Ma’in, wacce a yanzu aka san tana da kama da tsohon Qarnawu kusa da Ma’in zamani a cikin Al Jawf Governorate. Imam Yahyā al-Hādi ilā al-Haqq I wanda ya yi sarauta daga 893 zuwa 911 ya kafa Saada a matsayin tushe na ikon Zaydi. Bayan ƙaura babban birnin ƙasar zuwa Sanaa, mai nisan kilomita 175 (mil 110) kudu-maso-kudu-maso-gabas a ƙarni na 17, Saada ta ƙi mahimmanci, kodayake ta kasance cibiyar gudanarwa a arewa. Bayan yakin Saada a shekara ta 2011, Houthis sun mamaye birnin. A ranar 21 ga Janairu, 2022, wani hari ta sama ya kai wani gidan yari a birnin, inda ya kashe 1000 tare da raunata 200. Sa'dah tana da yanayin hamada mai zafi (Köppen weather classification: BWh). Sa'dah's Al-Hadi Mosque Islamic structure in Sa'dah "Yemen: provinces population". www.populstat.info. Retrieved 2015-07-21.