Gwamnan Legas shine shugaban Gwamnatin Legas . Gwamnan yana jagorantar bangaren zartarwa na Gwamnatin Jihar Legas . Wannan matsayi ya sanya mai riƙe shi a jagorancin jihar tare da ikon sarrafawa akan al'amuran jihar. Ana yawan bayyana Gwamna a matsayin ɗan ƙasa na ɗaya na jihar. Mataki na II na Kundin Tsarin Mulki na Najeriya ya ba ikon zartarwa na jihar a cikin gwamna kuma ya bashi damar aiwatar da dokar jihar, tare da alhakin nada shugabannin zartarwa, na diflomasiyya, na doka, da na jami'an shari'a bisa amincewar mambobin Majalisar. . Ikon farko da Tsarin Mulki ya ba gwamna shi ne kujerar baƙi (veto). Sashin Gabatarwa ya bukaci duk wani kudiri da Majalisar Dokokin Jihar Legas ta zartar a gabatar wa da gwamna kafin ya zama doka. Da zarar an gabatar da doka, gwamnan yana da zaɓi uku: Sanya hannu a doka; kudirin sai ya zama doka. Sanya dokar sannan a mayar da ita ga majalisar dokokin jihar tana mai nuna rashin yarda; cikin lissafin ba ya zama doka, sai dai idan daya daga cikin gidan kuri'u mafi rinjaye da kujerar naƙi da kashi biyu bisa uku zaben.