| Office: | United States Attorney for the Southern District of New York |
| President1: | George W. Bush Barack Obama |
| Term Start1: | December 1, 2008 |
| Term End1: | August 13, 2009 |
| Predecessor1: | Michael J. Garcia |
| Successor1: | Preet Bharara |
| Birth Date: | 10 September 1965 |
| Alma Mater: | Cornell University (BA) New York University (JD) |
Lev L. Dassin (born 10 September 1965) was the acting US Attorney for the Southern District of New York serving in the position from December 2008 until August 2009.