Robert Potter Hill was an American politician and a U.S. Representative from Illinois and from Oklahoma.

Oklahoma's 5th congressional district is a congressional district in the U.S. state of Oklahoma. It borders all of the other congressional districts in the state except the 1st district. It is densely populated and covers most of Oklahoma County and all of Lincoln, Pottawatomie and Seminole counties, as well as parts of Canadian and Logan counties. With a Cook Partisan Voting Index rating of R+12, it is the least Republican district in Oklahoma, a state with an all-Republican congressional delegation.