| Dan Harrington | |
| State Senate: | Montana |
| State: | Montana |
| District: | 38th |
| Term: | 2000 - |
| Succeeded: | Incumbent |
| Party: | Democratic |
| Birth Date: | 12 February 1938 |
| Birth Place: | Butte, Montana |
| Death Date: | September 21, 2015 |
| Alma Mater: | Western Montana College |
| Occupation: | educator |
| Spouse: | Pat |
| Residence: | Butte, Montana |
Dan W. Harrington was a Democratic member of the Montana Senate, representing District 38 since 2000. He was President Pro Tempore. He was previously a member of the Montana House of Representatives from 1977 through 2001.