Robert A. Geisler (July 19, 1925 – April 7, 1993) was a former Democratic member of the Pennsylvania House of Representatives.
After he graduated he was drafted into the United States Air Force and served in World War II.
During the 1969 house election, he ran for the democrat side and ultimately won the race.
He became a member of the 27th district of Pennsylvania house of representatives starting from that year and ended his term in 1978.
In the early hours of April 7, 1993, Robert had died from a sudden heart attack.