Lloyd B. Omdahl (January 5, 1931 – April 14, 2024) was an American politician who was the 34th lieutenant governor of North Dakota, taking office after Ruth Meiers died in 1987. Governor George A. Sinner was re-elected with Omdahl on the Democratic-NPL ticket in 1988. He was the last Democrat to hold that role to date. Previously, Omdahl was a professor of political science at the University of North Dakota and was the Democratic nominee for North Dakota's at-large congressional district in 1976. He won the Democratic primary with 46,382 votes (86.43%), defeating Torfin Teigen, who took 7,281 votes (13.57%). In the general election, he lost to incumbent Republican Congressman Mark Andrews by 181,018 votes (62.45%) to 104,263 votes (35.97%). Russell Kleppe of the American Party took 4,600 votes (1.59%). Omdahl died in Grand Forks, North Dakota, on April 14, 2024, at the age of 93.