| Competition: | Wessex Football League |
| Season: | 2012–13 |
| Prevseason: | 2011–12 |
| Nextseason: | 2013–14 |
The 2012–13 Wessex Football League (known as the Sydenhams Football League (Wessex) for sponsorship reasons) was the 27th season of the Wessex Football League since its establishment in 1986.
The league consisted of two divisions: the Premier Division and Division One. Both divisions this season consisted of fewer teams than last season – the Premier Division had 21 teams and Division One had 16 teams.
| Competition: | Wessex Football League Premier Division |
| Winners: | Blackfield & Langley |
| Relegated: | New Milton Town Hayling United |
| League Topscorer: | 36 Aleksander Przespolewski (Newport (IOW)) |
| Highest Attendance: | 448 Alton Town v Hayling United |
| Lowest Attendance: | 11 Hayling United v Hamworthy United Hayling United v Newport (IOW) |
The Premier Division featured 21 teams, reduced from 22 the previous season, after Winchester City were promoted to the Southern League, Laverstock & Ford were relegated to Division One, and Brading Town withdrew from the league.
Two new teams joined the Premier Division, both promoted from Division One:
| Team | Stadium | |
|---|---|---|
| A.F.C. Portchester | Wicor Recreation Ground | |
| Alresford Town | Arlesbury Park | |
| Alton Town | Bass Sports Ground | |
| Bemerton Heath Harlequins | Moon Park | |
| Blackfield & Langley | Gang Warily | |
| Bournemouth | Victoria Park | |
| Christchurch | Hurn Bridge Sports Ground | |
| Downton | Brian Whitehead Sports Ground | |
| Fareham Town | Cams Alder | |
| Fawley | Waterside Sports & Social Club | |
| GE Hamble | Folland Park | |
| Hamworthy United | The County Ground | |
| Hayling United | College Ground | |
| Horndean | Five Heads Park | |
| Lymington Town | The Sports Ground | |
| Moneyfields | Moneyfields Sports Ground | |
| New Milton Town | Fawcett's Field | |
| Newport (IOW) | St Georges Park | |
| Romsey Town | The Bypass Ground | |
| Totton & Eling | Little Testwood Farm | |
| Verwood Town | Potterne Park |
| Competition: | Wessex Football League Division One |
| Winners: | Brockenhurst |
| Promoted: | Brockenhurst Whitchurch United |
| League Topscorer: | 24 Gareth Bricknell (Cowes Sports) Callum Coker (Petersfield Town) Declan Edwards (Brockenhurst & Team Solent) Sam Knowles (Fleet Spurs) |
| Highest Attendance: | 142 Brockenhurst v Whitchurch United |
| Lowest Attendance: | 2 Fleet Spurs v Stockbridge |
Division One featured 16 teams, reduced from 18 the previous season after AFC Portchester and Verwood Town were promoted to the Premier Division, and Warminster Town transferred to the Western League.[7]
One new team joined, relegated from the Premier Division:
| Team | Stadium | |
|---|---|---|
| Amesbury Town | Bonnymead Park | |
| Andover New Street | Foxcote Park | |
| Brockenhurst | Grigg Lane | |
| Cowes Sports | Westwood Park | |
| East Cowes Victoria Athletic | Beatrice Avenue | |
| Fleet Spurs | Kennels Lane | |
| Hythe & Dibden | Ewart Recreation Ground | |
| Laverstock & Ford | The Dell | |
| Petersfield Town | The Love Lane Stadium | |
| Pewsey Vale | The Recreation Ground | |
| Ringwood Town | Long Lane | |
| Stockbridge | Recreation Ground | |
| Tadley Calleva | Barlow's Park | |
| Team Solent | Test Park Sports Ground | |
| United Services Portsmouth | The Victory Stadium | |
| Whitchurch United | Longmeadow |