John W. Derr | |
|---|---|
| Member of the Maryland Senate from the 3rd district | |
| In office 1983 – January 13, 1999 | |
| Preceded by | Edward P. Thomas Jr. |
| Succeeded by | Alex Mooney |
| Personal details | |
| Born | March 18, 1941 Frederick, Maryland, United States |
| Political party | Republican |
John W. Derr (born March 18, 1941) is an American politician who was a member of the Maryland Senate representing District 3 from 1983 to 1999.