Oliver Perry Coshow (August 14, 1863 – December 18, 1937) was an American attorney and politician in Oregon.

[1] After receiving his primary education in the local schools he attended the University of Oregon in Eugene where he graduated in 1885.

During this time he was elected as a Democrat to the state senate representing Douglas County, serving from 1905 through the 1907 legislature.

[2][3] On January 15, 1924, Oliver Coshow was appointed by Oregon Governor Walter M. Pierce to replace justice Lawrence T. Harris on the Oregon Supreme Court after Harris resigned his position.

[4] Oliver was married in 1886 to Elizabeth Kay of Salem, and they had four daughters together.