The1956–57Southern Football League season was the 54th in the history of the league, an Englishfootball competition.
No new clubs had joined the league for this season so the league consisted of 22 clubs from previous season.Kettering Town were champions, winning their first Southern League title. Five Southern League clubs applied to jointhe Football League at the end of the season, but none were successful. At the end of the season Welsh FA refused to sanction Llanelly's stay in the Southern League, the club left the league after seven years and switched to the Welsh football pyramid.
| Season | 1956–57 |
|---|---|
| Champions | Kettering Town |
| Matches | 462 |
| Goals | 1,613 (3.49 per match) |
1957–58 → | |
| Pos | Team | Pld | W | D | L | GF | GA | GR | Pts | Results |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Kettering Town | 42 | 28 | 10 | 4 | 106 | 47 | 2.255 | 66 | |
| 2 | Bedford Town | 42 | 25 | 8 | 9 | 89 | 52 | 1.712 | 58 | |
| 3 | Weymouth | 42 | 22 | 10 | 10 | 92 | 71 | 1.296 | 54 | |
| 4 | Cheltenham Town | 42 | 19 | 15 | 8 | 73 | 46 | 1.587 | 53 | |
| 5 | Gravesend & Northfleet | 42 | 21 | 11 | 10 | 74 | 58 | 1.276 | 53 | |
| 6 | Lovells Athletic | 42 | 21 | 7 | 14 | 99 | 84 | 1.179 | 49 | |
| 7 | Guildford City | 42 | 18 | 11 | 13 | 68 | 49 | 1.388 | 47 | |
| 8 | Hereford United | 42 | 19 | 8 | 15 | 96 | 60 | 1.600 | 46 | |
| 9 | Headington United | 42 | 19 | 7 | 16 | 64 | 61 | 1.049 | 45 | |
| 10 | Gloucester City | 42 | 18 | 8 | 16 | 74 | 72 | 1.028 | 44 | |
| 11 | Hastings United | 42 | 17 | 9 | 16 | 70 | 58 | 1.207 | 43 | |
| 12 | Worcester City | 42 | 16 | 10 | 16 | 81 | 80 | 1.013 | 42 | |
| 13 | Dartford | 42 | 16 | 10 | 16 | 79 | 88 | 0.898 | 42 | |
| 14 | Chelmsford City | 42 | 16 | 9 | 17 | 73 | 85 | 0.859 | 41 | |
| 15 | Tonbridge | 42 | 14 | 12 | 16 | 74 | 65 | 1.138 | 40 | |
| 16 | Yeovil Town | 42 | 14 | 11 | 17 | 83 | 85 | 0.976 | 39 | |
| 17 | Bath City | 42 | 15 | 8 | 19 | 56 | 78 | 0.718 | 38 | |
| 18 | Exeter City II | 42 | 10 | 10 | 22 | 52 | 89 | 0.584 | 30 | |
| 19 | Merthyr Tydfil | 42 | 9 | 11 | 22 | 72 | 95 | 0.758 | 29 | |
| 20 | Barry Town | 42 | 6 | 11 | 25 | 39 | 84 | 0.464 | 23 | |
| 21 | Kidderminster Harriers | 42 | 7 | 10 | 25 | 60 | 83 | 0.723 | 20[a] | |
| 22 | Llanelly | 42 | 5 | 8 | 29 | 39 | 123 | 0.317 | 18 | Left the league |
Five Southern League clubs applied for election to the Football League. However, none were successful as all four League clubs were re-elected.[1]