Isthmian League Division 1 South 2017 / 2018
| Ashford United | Faversham Town | Hythe Town | Sittingbourne |
| Carshalton Athletic | Greenwich Borough | Lewes | South Park |
| Chipstead | Guernsey | Molesey | Thamesmead Town |
| Corinthian Casuals | Hastings United | Phoenix Sports | VCD Athletic |
| Cray Wanderers | Herne Bay | Ramsgate |
Walton Casuals |
| East Grinstead Town | Horsham | Shoreham | Whyteleafe |