2017–18 Welsh Football League Division One
| Season | 2017–18 |
|---|---|
| Dates | 11 August 2017 – 19 May 2018 |
| Champions | Llanelli Town |
| Promoted | Llanelli Town |
| Matches played | 240 |
| Goals scored | 876 (3.65 per match) |
← 2016–17 2018–19 →
All statistics correct as of 21 April 2018. | |
The 2017–18 Welsh Football League Division One (known as the Nathaniel Cars Welsh Football League Division One for sponsorship reasons) was the 2017–18 season of the top football league in South Wales. Together with its North Wales counterpart, the Cymru Alliance, the 16-team division forms the second tier of the Welsh football league system, one level below the nationwide Welsh Premier League. The season began on 11 August 2017 and concluded in May 2018.