Roseann Ambrosia Ketchmark (born October 31, 1963) is a United States District Judge of the United States District Court for the Western District of Missouri and a former Assistant United States Attorney. On November 20, 2014, President Barack Obama nominated Ketchmark to serve as a United States District Judge of the United States District Court for the Western District of Missouri, to the seat vacated by Judge Gary A. Fenner, who at the time was taking senior status on a date to be determined. He eventually assumed senior status once Ketchmark was confirmed on September 8, 2015. She received her judicial commission on September 14, 2015.