The 20th Anniversary Series is a series of singles released by the American punk rock band The Bouncing Souls in 2009 to mark the twentieth year of the band's career.

Over the course of the year, a total of 16 songs were released by the band's label Chunksaah Records as 7-inch singles and music downloads.

The digital singles were released once a month, from January 1 to December 1, with 4 bonus songs being given out at the end of the year to those that purchased a subscription of the singles.

The 12 main songs were collected for a proper album, titled Ghosts on the Boardwalk.

A locked groove lays Between tracks 3 and 4[2] Volume Four was released in December 2009.