Zakhary Ivanovich Koshkin (died 1461) was a boyar at the court of Vasili II. He was a male-line forefather of the Romanov family, and the first Romanov Tsar, Michael I of Russia, was his agnatic descendant.
Koshkin was the son of Ivan Fyodorovich Koshkin. He had several brothers: Yakov, Ivan, and Feodor. He was the great-grandfather of Anastasia Romanovna, the first wife of Ivan the terrible, and a progenitor of the Romanov dynasty. The first Romanov Tsar of Russia, Michael I, was a male-line descendant of Zakhary.