The 2012–13 Sussex County Football League season was the 88th in the history of Sussex County Football League a football competition in England.
This was to fulfil the expansion of the Isthmian League Divisions One North and South from 22 to 24 clubs each.
[1] The two clubs were to be promoted on a points per game basis,[2] and the two runners-up with the best PPG were VCD Athletic (Kent Football League) and Guernsey (Combined Counties League).
Three others – Aylesbury United (Spartan South Midlands League), Redhill (Sussex County League) and Barkingside (Essex Senior League) – were also confirmed as promoted by the FA on 17 May, due to resignations and non-promotions elsewhere.
Division Two featured 15 clubs which competed in the division last season, along with three new clubs, promoted from Division Three: Division Three featured ten clubs which competed in the division last season, along with two new clubs, joined from the West Sussex League: Also, Ifield Edwards changed name to Ifield.