Robert Gerald Marshall (born May 3, 1944) is an American businessman, author and former politician, who was a Republican member of the Virginia House of Delegates representing the 13th District. His district included portions of Prince William and Loudoun counties. He is known for his failed "bathroom bill" proposal, which would have forced people to use restrooms that correspond with the sex on their original birth certificates. In the November 7, 2017, general election, Marshall was defeated by nine percentage points by Democrat Danica Roem, the first openly transgender candidate elected to a state legislature in the United States.