| David M. Ainsworth | |
| State House: | Vermont |
| District: | Windsor-Orange-1[1] |
| Term Start: | 2017 |
| Term End: | 2019 |
| Predecessor: | Sarah E. Buxton |
| Successor: | John O'Brien |
| Term Start2: | 2007 |
| Term End2: | 2011 |
| Predecessor2: | Rosemary McLaughlin |
| Successor2: | Sarah E. Buxton |
| Birth Date: | 8 July 1954 |
| Birth Place: | Hanover, New Hampshire, U.S. |
| Death Place: | Lebanon, New Hampshire, U.S. |
| Party: | Republican |
| Spouse: | Peggy |
| Children: | 3 |
| Alma Mater: | University of Vermont (BS) |
| Profession: | Dairy farmer Vegetable grower/marketer |
David M. Ainsworth[2] (July 8, 1954 – May 31, 2019) was an American politician and a Republican member of the Vermont House of Representatives representing Windsor-Orange-1 District.
Born in Hanover, New Hampshire,[3] he held a B.S. from University of Vermont (1977). Ainsworth was a fifth-generation dairy and vegetable farmer.[4]
Ainsworth was former Royalton Town Moderator. He was elected to the Vermont House of Representatives in 2016, unseating incumbent Democrat Sarah E. Buxton by one vote.[5] Two years later in 2018, Ainsworth was defeated for re-election by John O'Brien.[6] Ainsworth previously served as the State Representative from 2007 to 2011.