Abdulloh ibni Tohir (soli 798, Nishopur – 845, hamon jo), pisari Abutayyib Tohir – seyumin amiri Tohiriyon. Abdulloh pas az margi barodarash Talha ba amorati Khuroson nishast. Abdulloh dar zamoni hayoti padarash shahnai Bagdod bud. Vay misli padarash dar furu nishondani nooromihoi sarzaminho va qiyomhoi muluki arab[ naqshi muassir guzosht. Abdulloh tavonist shurishhoi umaroi arab, ba monanda Nasr ibni Shabas (824 – 825), qiyomhoi Iroq sarkashii Ubaydulloh (825 – 826) va junbishhoi Misrro furu nishonad.
Abdulloh soli 829 tibqi farmoni khalifa baroi furu nishondani tokhtutozi khavorij dar Khuroson ba on viloyot firistoda shud. Abdulloh dar soli 830 ba Nishopur rasid va onro poytakhti khud intikhob kard. Dar muddati ponzdah soli hukumatash (830 – 845) ehtiromi abbosiyonro rioyat mekard.
Khalifa Mutasim (833 – 842) bar khilofi Mamun nisbat ba Abdulloh khushbin nabud. Abdulloh qabl az margash, ilova bar Khuroson, hamchunin bar viloyoti Ray, Jibol, Mozandaron, Tabariston, Ruyon va Kirmon farmonravoi mekard. Hamzamon farmondehi nizomiyoni Bagdod bud.
Siyosati Abdulloh nisbat ba khalifai abbosi musolimatomez va dustona bud. Vay say mekard to khashmi khalifaro nisbat ba khud va dudmonash barnaangezad. Abdulloh adib va shoir ham bud va monandi padarash ba arabi sher meguft. Ba musiqi aloqa dosht va baze ohanghoro ba u mansub donistaand. U monandi padarash ruhiyai arabi va taassub ba mazhabi islom dosht va kitobhoi eroniyoni qabl az islomro otash mezad.