| Mary Ann MacKenzie | |
| State House: | Florida |
| District: | Dade County |
| Term Start: | 1963 |
| Term End: | 1966 |
| Birth Date: | 22 November 1925 |
| Birth Place: | Hornell, New York, U.S. |
| Death Place: | Dade County, Florida, U.S. |
| Party: | Democratic |
| Occupation: | lawyer |
| Spouse: | Donald Grant MacKenzie |
| Children: | two |
| Residence: | Miami, Florida |
Mary Ann MacKenzie (November 22, 1925 – December 24, 1997) was a politician in the American state of Florida. She served in the Florida House of Representatives from 1963 to 1966, representing Dade County.[1] [2] She later was a judge on the Eleventh Judicial Circuit Court of Florida.[2]