2017–18 Southern Football League
The 2017–18 season was the 115th in the history of the Southern League since its establishment in 1894. It was also the last to have a single Premier Division. From the 2014–15 season onwards, the Southern League is known as Evo-Stik League Southern, following a sponsorship deal with Evo-Stik.
The league constitution was announced in May 2017.
Premier Division
At the end of the season a new division was to be created at step 3. Also, the number of clubs in step 3 divisions was reduced from 24 to 22. To make up the number of clubs at step 3 only one Premier Division club was to be relegated this season.The Premier Division consisted of 24 clubs, including 18 clubs from the previous season, and six new clubs:
- Two clubs promoted from Division One Central:
- *Farnborough
- *Royston Town
- Two clubs promoted from Division One South & West:
- *Hereford
- *Tiverton Town
- Two clubs relegated from the National League South:
- *Bishop's Stortford
- *Gosport Borough
League table
Play-offs
Semi-finals'''Final'''
Stadia and locations
| Club | Stadium | Capacity |
| Banbury United | Spencer Stadium | 2,000 |
| Basingstoke Town | The Camrose | 6,000 |
| Biggleswade Town | Langford Road | 3,000 |
| Bishop's Stortford | Woodside Park | 4,525 |
| Chesham United | The Meadow | 5,000 |
| Dorchester Town | The Avenue Stadium | 5,009 |
| Dunstable Town | Creasey Park | 3,200 |
| Farnborough | Cherrywood Road | 7,000 |
| Frome Town | Badgers Hill | 2,000 |
| Gosport Borough | Privett Park | 4,500 |
| Hereford | Edgar Street | 4,913 |
| Hitchin Town | Top Field | 4,000 |
| Kettering Town | Latimer Park | 2,400 |
| King's Lynn Town | The Walks | 5,733 |
| Kings Langley | Gaywood Park | 1,000 |
| Merthyr Town | Penydarren Park | 10,000 |
| Redditch United | The Valley | 5,000 |
| Royston Town | Garden Walk | 5,000 |
| Slough Town | Arbour Park | 1,950 |
| St Ives Town | Westwood Road | 2,000 |
| St Neots Town | New Rowley Park | 3,500 |
| Stratford Town | Knights Lane | 1,400 |
| Tiverton Town | Ladysmead | 3,500 |
| Weymouth | Bob Lucas Stadium | 6,600 |
Division One East
For this season, Division One Central was renamed Division One East.At the end of the season a new division was to be created at step 3. To make up the number of clubs at step 3 two clubs from each step 4 division, one club with best points-per-game among the step 4 division clubs and six play-off winners were to be promoted this season. Also, a new division were to be added at step 4 within the Isthmian League, while the number of clubs in every step 4 division was decreased to 20. To make up the number of clubs only one club was to be relegated.
Division One East consisted of 22 clubs, including 16 clubs from the previous season Division One Central, and six new clubs:
- AFC Rushden & Diamonds, transferred from the Northern Premier League Division One South
- Cambridge City, relegated from the Premier Division
- Hartley Wintney, promoted from the Combined Counties League
- Hayes & Yeading United, relegated from the Premier Division
- Moneyfields, promoted from the Wessex League
- Thame United, promoted from the Hellenic League
League table
Play-offs
Semi-finals'''Final'''
Stadia and locations
| Club | Stadium | Capacity |
| AFC Dunstable | Creasey Park | 3,500 |
| AFC Kempston Rovers | Hillgrounds Leisure | 2,000 |
| AFC Rushden & Diamonds | Hayden Road | 1,500 |
| Arlesey Town | Hitchin Road | 2,920 |
| Ashford Town | Robert Parker Stadium | 2,550 |
| Aylesbury | Haywood Way | 1,300 |
| Aylesbury United | The Meadow | 5,000 |
| Barton Rovers | Sharpenhoe Road | 4,000 |
| Beaconsfield Town | Holloways Park | 3,500 |
| Bedford Town | The Eyrie | 3,000 |
| Cambridge City | Westwood Road | 2,000 |
| Chalfont St Peter | Mill Meadow | 1,500 |
| Egham Town | The Runnymede Stadium | 5,565 |
| Fleet Town | Calthorpe Park | 2,000 |
| Hanwell Town | Reynolds Field | 3,000 |
| Hartley Wintney | The Memorial Playing Fields | 2,000 |
| Hayes & Yeading United | Beaconsfield Road | 3,000 |
| Marlow | Alfred Davis Memorial Ground | 3,000 |
| Moneyfields | Moneyfields Sports Ground | 2,000 |
| Northwood | Northwood Park | 3,075 |
| Thame United | Meadow View Park | 2,000 |
| Uxbridge | Honeycroft | 3,770 |
Division One West
For this season, Division One South & West was renamed Division One West.At the end of the season a new division was to be created at step 3. To make up the number of clubs at step 3 two clubs from each step 4 division, one club with best points-per-game among the step 4 division clubs and six play-off winners were to be promoted this season. Also, a new division were to be added at step 4 within the Isthmian League, while the number of clubs in every step 4 division was decreased to 20. To make up the number of clubs only one club was to be relegated.
Division One West featured four new clubs:
- Bristol Manor Farm, promoted from the Western League
- Cinderford Town, relegated from the Premier Division
- Cirencester Town, relegated from the Premier Division
- Kidlington, transferred from Division One Central
League table
Play-offs
Semi-finals'''Final'''
Stadia and locations
| Club | Stadium | Capacity |
| AFC Totton | Testwood Stadium | 3,000 |
| Barnstaple Town | Mill Road | 5,000 |
| Bideford | The Sports Ground | 2,000 |
| Bishops Cleeve | Kayte Lane | 1,500 |
| Bristol Manor Farm | The Creek | 2,000 |
| Cinderford Town | Causeway Ground | 3,500 |
| Cirencester Town | Corinium Stadium | 4,500 |
| Didcot Town | Loop Meadow | 3,000 |
| Evesham United | Jubilee Stadium | 3,000 |
| Kidlington | Yarnton Road | 1,500 |
| Larkhall Athletic | The Plain Ham Ground | 1,000 |
| Mangotsfield United | Cossham Street | 2,500 |
| North Leigh | Eynsham Hall Park Sports Ground | 2,000 |
| Paulton Rovers | Athletic Field | 2,500 |
| Salisbury | Raymond McEnhill Stadium | 5,000 |
| Shortwood United | Meadowbank Ground | 2,000 |
| Slimbridge | Thornhill Park | 1,500 |
| Swindon Supermarine | Hunts Copse Ground | 3,000 |
| Taunton Town | Wordsworth Drive | 2,500 |
| Wimborne Town | The Cuthbury | 3,250 |
| Winchester City | The City Ground | 4,500 |
| Yate Town | Lodge Road | 2,000 |
League Cup
The 2017–18 Southern League Cup was the 80th edition of the Southern League Cup, the cup competition of the Southern Football League.Hereford, Mangotsfield United, and North Leigh declined to participate. The defending champions, Hayes & Yeading United, were defeated in the semi-finals by Hitchin Town.
Quarter-finals
| Tie | Home team | Score | Away team | |
| 58 | Didcot Town | 3–0 | Redditch United | |
| 59 | Hitchin Town | 2–0 | Kempston Rovers |
| Tie | Home team | Score | Away team | |
| 60 | Hayes & Yeading United | 6–5 | Marlow | |
| 61 | Frome Town | 0–1 | Larkhall Athletic |