It took place between July and September, with 33 teams taking part: 31 county teams plus Wales and the Netherlands.
Kent Women won the Twenty20 Cup, beating Sussex Women in the final, achieving their second title.
The tournament ran alongside the 50-over 2013 Women's County Championship.
[1] Teams played matches within a series of regionalised divisions, with the winners of the top divisions progressing to semi-finals and a final.
The winners of each Division 1, and the best-performing second-place team, progressed to the semi-finals.