Walter Cass Newberry (December 23, 1835 - July 20, 1912) was a U.S. Representative from Illinois. Newberry was born in Waterville, New York and enlisted in the Union Army during the Civil War as a private in the Eighty-first Regiment, New York Volunteers. He was promoted to lieutenant in 1861, captain in 1862, major of the Twenty-fourth Regiment, New York Cavalry, in 1863, lieutenant colonel and colonel in 1864, and was brevetted brigadier general March 31, 1865. He died in Chicago on July 20, 1912 and was interred in Graceland Cemetery.