The 2017–18 Combined Counties Football League season (known as the 2017–18 Cherry Red Records Combined Counties Football League for sponsorship reasons) was the 40th in the history of the Combined Counties Football League, a football competition in England.
The constitution was announced on 26 May 2017.[1]
| Competition: | Combined Counties Football League Premier Division |
| Season: | 2017–18 |
| Winners: | Westfield |
| Promoted: | Westfield Bedfont Sports |
| Relegated: | Godalming Town Epsom & Ewell Farnham Town |
| Matches: | 462 |
| Total Goals: | 1605 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
The Premier Division was reduced from 23 to 22 clubs, and featured four new teams after the promotion of Hartley Wintney to the Southern League, the transfer of Windsor to the Hellenic League, and the relegation of Badshot Lea, Bedfont & Feltham and Raynes Park Vale to the First Division:
With the suspension of ground grading Grade E for this season and the creation of a new league at Steps 3 and 4, the champions of all Step 5 leagues were compulsorily promoted to Step 4. Of the fourteen runners-up, the twelve clubs with the best PPG (points per game ratio) were also to be compulsorily promoted, but with resignations and mergers in leagues above, thirteen runners-up were promoted.
Teams at Step 5 without ground grading Grade F were to be relegated to Step 6, but no club in this division failed the ground grading process. All Step 5 leagues were fixed at 20 clubs for 2018–19, but in this case there were no further relegations or reprieves.
| Competition: | Combined Counties Football League Division One |
| Season: | 2017–18 |
| Winners: | Worcester Park |
| Promoted: | Cobham Badshot Lea Raynes Park Vale |
| Matches: | 342 |
| Total Goals: | 1498 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018–19 |
Division One was increased from 18 to 19 clubs, and featured six new teams after Balham, Banstead Athletic and Redhill were promoted to the Premier Division, and Dorking and Epsom Athletic left the league:
Step 6 clubs without ground grading Grade G were to be relegated to Step 7, and three clubs in this division failed the ground grading process. All Step 6 leagues were fixed at a maximum of 20 clubs for 2018–19, but in this case there were no further relegations or reprieves.