Mary Louise Preis | |
|---|---|
| Member of the Maryland House of Delegates from District 34 | |
| In office 1991–1999 | |
| Preceded by | B. Daniel Riley |
| Succeeded by | Charles R. Boutin |
| Constituency | Harford County |
| Personal details | |
| Born | October 10, 1941 Jacksonville, Illinois |
| Political party | Democratic |
| Profession | lawyer, politician |
Mary Louise Preis (born October 10, 1941) is an American politician who represented district 34 in the Maryland House of Delegates. She was first elected in 1990 and served until 1999.