| Michael K. Hanna Sr. | |
| State House: | Pennsylvania |
| District: | 76th |
| Term Start: | January 1, 1991[1] |
| Term End: | January 1, 2019 |
| Predecessor: | Russell Letterman |
| Successor: | Stephanie Borowicz |
| Title2: | Democratic Whip of the Pennsylvania House of Representatives |
| Term Start2: | January 4, 2011 |
| Term End2: | January 1, 2019 |
| Predecessor2: | Frank Dermody |
| Successor2: | Jordan A. Harris |
| Birth Date: | 25 August 1953[2] |
| Birth Place: | Lock Haven, Pennsylvania, United States |
| Party: | Democratic |
| Alma Mater: | Lock Haven University University of Pittsburgh |
| Occupation: | Lawyer |
| Spouse: | Susan Hanna |
| Children: | 2 |
| Residence: | Lock Haven, Pennsylvania |
Michael K. Hanna Sr. (born August 25, 1953) is an American politician from Pennsylvania who served as a Democratic member of the Pennsylvania House of Representatives for the 76th district from January 1, 1991 to January 1, 2019. On February 12, 2018 he announced his retirement from public office. He served as Minority Whip in the legislature from 2011 until his retirement. Hanna was Majority Chairman of The House Agriculture and Rural Affairs Committee from 2007 until 2010, sheperding the passage of PA Food Safety Bill and updates to PA Dog Law.