Jeffrey Bossert Clark (born April 17, 1967) is an American lawyer who was Assistant Attorney General for the Environment and Natural Resources Division from 2018 to 2021. In September 2020, he was also appointed acting head of the Civil Division. In 2020 and 2021, Clark helped then-president Donald Trump attempt to subvert the 2020 presidential election. Clark's actions in that endeavor were reviewed by the District of Columbia Bar Association – the entity authorized by law to pursue attorney discipline and disbarment in the District of Columbia – which recommended discipline to the DC Court of Appeals in July 2022.