Matthew Joseph Kacsmaryk ( 1977) is a United States district judge of the U.S. District Court for the Northern District of Texas. He was nominated to the position by President Donald Trump in 2017 and sworn in for the position in 2019. In 2023, he presided over a lawsuit regarding the Food and Drug Administration (FDA)'s approval of abortion medication mifepristone in 2000, and had issued a preliminary ruling suspending the approval of the drug, marking the first time a court tried to invalidate the approval of a drug over the FDA's objection.