313 is a year of the Julian calendar.
313 may also refer to: 313 BC, a year of the pre-Julian Roman calendar 313 (album), a 2006 album by Phideaux Xavier Area code 313, a telephone code for Detroit in the North American Numbering Plan British Rail Class 313, a type of train 313 Chaldaea, a main-belt asteroid Frame 313, part of the Zapruder film, showing the fatal shot to President Kennedy 313, the name of Donald Duck's car in Disney comics 313@Somerset, a shopping mall in Orchard Road