| Tim O'Brien | |
| Office: | 39th Mayor of New Britain |
| Term Start: | November 16, 2011 |
| Term End: | November 12, 2013 |
| Predecessor: | Tim Stewart |
| Successor: | Erin Stewart |
| Birth Name: | Timothy O'Brien |
| Birth Date: | 13 June 1968 |
| Party: | Democratic |
| Spouse: | Rhona Cohen |
| Children: | 1 biological daughter, 1 step son |
| Website: | Personal website |
| Term Start2: | January 8, 2003 |
| Term End2: | November 15, 2011 |
| State House2: | Connecticut |
| District2: | 24th |
| Predecessor2: | David B. Pudlin |
| Successor2: | Rick Lopes |
Tim O'Brien (born June 13, 1968) is an American politician who served as an elected official in Connecticut in different positions from 1997 to 2013. He was most recently Mayor of New Britain, Connecticut, serving from 2011[1] to 2013. From 2003 to 2011, O'Brien was a member of the Connecticut House of Representatives and represented the 24th Assembly District, which includes parts of New Britain and Newington, Connecticut.[2] From 1997 to 2003, O'Brien was a member of the New Britain City Council.