Mary Schneider is a Democratic member of the North Dakota House of Representatives, representing District 21 since 2014. She previously served in the chamber at the same time as her son, Mac Schneider, until his reelection loss. Schneider has been a candidate in North Dakota House and Senate elections between 2008 and 2026, winning two races and losing one, and has declared her candidacy for the 2026 North Dakota Senate election in District 21 to succeed retiring Senator Kathy Hogan, running unopposed in the Democratic–NPL primary.