Rūsiņš of Satekle (Latin: Russinus de Sotekele) was a Latgalian duke in the early 13th century who is several times mentioned in ancient sources due to his activities in Livonian Crusade.
Rūsiņš date of birth is unknown and it is presumed that his residence was Satekle castle (most likely Tanīsa hillfort in the modern village of Rauna) which was important centre in the Latgalian county of Tālava.
Rūsiņš is first time mentioned by name in 1208 when he, together with dukes Varidots of Autīne and Tālivaldis of Beverīna, signed military alliance with the Livonian Brothers of the Sword.
It is known that Rūsiņš participated in a military campaign against the Estonians in early 1211, and also conducted a raid to on Soontagana together with the crusaders, Russians from Pskov, and Livonian dukes Dabrels, Ninns and Caupo of Turaida.
According to the Livonian Chronicle of Henry, Rūsiņš was on the castle wall when he saw his friend and former ally knight Berthold among the crusaders as he took off his helmet to greet him and almost immediately was killed by a crossbow arrow.