National History Day in Missouri will host regional contests for students grades 6-12, leading up to the Missouri History Day state contest on April 25, 2026. Students from each region will present their innovative projects in one of five categories: documentary, exhibit, paper, performance, or website. Contest winners will represent their region at the NHDMO state contest in April, which is administered by the State Historical Society of Missouri. Below are the dates and locations of each regional contest.