| Office1: | Deputy Minority Leader of the New Hampshire House of Representatives |
| Leader1: | David Cote |
| Predecessor1: | David Cote |
| Term Start1: | March 25, 2022 |
| Office2: | Majority Leader of the New Hampshire House of Representatives |
| Predecessor2: | Michael O’Neill |
| Successor2: | D.J. Bettencourt |
| Term Start2: | 2007 |
| Term End2: | December 1, 2010 |
| Mary Jane Wallner | |
| State House3: | New Hampshire |
| State3: | New Hampshire |
| District3: | Merrimack 10th |
| Term Start3: | December 1980 |
| Birth Date: | 25 October 1946 |
| Birth Place: | St. Louis, Missouri |
| Spouse: | Nicholas |
| Profession: | educator |
| Education: | University of New Hampshire (BS) |
| Party: | Democratic |
Mary Jane Wallner (born October 25, 1946) is a Democratic member of the New Hampshire House of Representatives, one of the three members representing the Merrimack 10th District since 1980. She served as the Majority Leader from 2007 to 2010.