The Seaside Siren Roller Girls (SSRG) are a roller derby league based in Southend-on-Sea, Essex, in England. Founded in 2009, the league consists of two teams, which compete against teams from other leagues.
The league was founded in November 2009 by six skaters who had formerly skated with another league, but wanted to play closer to their home town. The league began practising on Canvey Island, and had fourteen skaters by early 2010. It played its first bout in April 2011, when it faced the Norfolk Brawds.
In June 2012, the Seaside Sirens were accepted as a member of the United Kingdom Roller Derby Association, while in October 2013, they were accepted as a member of the Women's Flat Track Derby Association Apprentice Programme.