The last boundary and electoral review of the East Sussex County Council Electoral Divisions was implemented at the County Council Elections held on 4 May 2017.
Arlington, East Hoathly & Hellingly1Arlington Ward, Chiddingly, East Hoathly & Waldron Ward and Hellingly Ward.
To view maps of electoral areas please visit the Ordnance Survey Election Maps web site.
| Electoral Division Name | Number of County Councillors | Constituent District Wards |
| Crowborough North & Jarvis Brook | 1 | Crowborough Central Ward, Crowborough Jarvis Brook Ward and Crowborough North Ward |
| Crowborough South & St Johns | 1 | Crowborough South East Ward, Crowborough South West Ward, Crowborough Johns Ward |
| Forest Row & Groombridge | 1 | Forest Row Ward, Hartfield Ward and Withyham Ward |
| Hailsham Market | 1 | Hailsham Central Ward, Hailsham East Ward and Hailsham North Ward |
| Hailsham New Town | 1 | Hailsham North West Ward, Hailsham South Ward and Hailsham West Ward |
| Heathfield & Mayfield | 1 | Heathfield North Ward, Heathfield South Ward and Mayfield & Five Ashes Ward |
| Maresfield & Buxted | 1 | Buxted Ward, Danehill & Fletching Ward and Maresfield Ward |
| Pevensey & Stone Cross | 1 | Pevensey Bay Ward, Stone Cross Ward and the Pevensey Parish and Westham Parish areas within the Herstmonceux & Pevensey Levels Ward |
| Polegate & Watermill | 1 | Polegate Central Ward, Polegate North Ward and Polegate South & Willingdon Watermill Ward |
| Uckfield North | 1 | Uckfield East Ward, Uckfield North Ward and the Town Council Ward of Uckfield West |
| Uckfield South with Framfield | 1 | Framfield & Cross-in-Hand Ward, Uckfield Ridgewood & Little Horsted Ward and the Town Council Ward of Uckfield New Town |
| Wealden East | 1 | Horam & Punnetts Town Ward and the Parishes of Hooe, Ninfield and Wartling |
| Wealden North East | 1 | Frant & Wadhurst Ward and Hadlow Down & Rotherfield Ward |
| Willingdon & South Downs | 1 | South Downs Ward, Lower Willingdon Ward and Upper Willingdon Ward |