Samuel Bonsall Parish (1838–1928) was a California botanist and curator of the herbarium at Stanford University.
After studying at New York University in 1858, he became a professor and then participated for four years at the American Civil War.
With his brother, he bought a ranch near San Bernardino in 1872 and studied the flora of southern California.
His collection of plants of this region led him to undertake a collaboration with Charles Christopher Parry and C. G. Pringle.
His herbarium was sold to Stanford University in 1917.