Samuel Myron Brainerd (November 13, 1842 – November 21, 1898) was a Republican member of the U.S. House of Representatives from Pennsylvania. Samuel M. Brainerd was born in Albion, Pennsylvania. He attended the public schools, Edinboro Normal School, and University of Michigan Law School in Ann Arbor, Michigan. He was admitted to the bar in 1869 and commenced practice in North East, Pennsylvania. He served as district attorney of Erie County, Pennsylvania, from 1872 to 1875. He moved to Erie, Pennsylvania, in 1874 and continued the practice of law. He was chairman of the Republican county committee in 1880.