William Harold Nungesser is an American politician serving as the 54th lieutenant governor of Louisiana since 2016. A member of the Republican Party, Nungesser is also the former president of the Plaquemines Parish Commission, having been re-elected to a second four-year term in the 2010 general election in which he topped two opponents with more than 71 percent of the vote. His second term as parish president began on January 1, 2011, and ended four years later.

The lieutenant governor of Louisiana is the second highest state office in Louisiana. The current lieutenant governor is Billy Nungesser, a Republican. The lieutenant governor is also the commissioner of the Louisiana Department of Culture, Recreation & Tourism.