Accidentally on Purpose is an American television situation comedy series that ran on CBS from September 21, 2009 to April 21, 2010 during the 2009–10 season. The series stars Jenna Elfman and was produced by BermanBraun and CBS Productions. The show is based on the book of the same name by Mary F. Pols.

On May 18, 2010, CBS cancelled the series after one season.