| Mark Willadsen | |
| Office: | Member of the South Dakota House of Representatives from the 11th district |
| Term Start1: | January 13, 2015 |
| Predecessor1: | Christine Erickson Jim Stalzer |
| Term Start2: | January 11, 2011 |
| Term End2: | January 8, 2013 |
| Predecessor2: | Todd Schlekeway Darrell Solberg |
| Successor2: | Christine Erickson Jim Stalzer |
| Term Start3: | January 11, 2005 |
| Term End3: | January 13, 2009 |
| Predecessor3: | Keri Weems Rebekah Cradduck |
| Successor3: | Todd Schlekeway Darrell Solberg |
| Birth Date: | 17 February 1955 |
| Birth Place: | Sioux Falls, South Dakota, U.S. |
| Party: | Republican |
Mark Willadsen (born February 17, 1955) is an American politician who has served in the South Dakota House of Representatives from the 11th district since 2015. He previously served in the South Dakota House of Representatives from 2005 to 2009 and from 2011 to 2013.[1] [2]