| Clubname: | Seven Sisters Onllwyn |
| Fullname: | Seven Sisters Onllwyn Football Club |
| Founded: | 1910 / 1988 (2020 merger) |
| Ground: | Welfare Ground |
| Capacity: | 500 |
| Chairman: | Leighton Williams |
| Pattern La1: | Blue |
| Pattern B1: | Blue |
| Pattern Ra1: | Blue |
| Leftarm1: | 008000 |
| Body1: | 008000 |
| Rightarm1: | 008000 |
| Shorts1: | 008000 |
| Socks1: | 008000 |
| Pattern La2: | Blue |
| Pattern B2: | Blue |
| Pattern Ra2: | Blue |
| Leftarm2: | 000 |
| Body2: | ff8c00 |
| Rightarm2: | 000 |
| Shorts2: | 000 |
| Socks2: | ff8c00 |
Seven Sisters Onllwyn F.C. is a Welsh football team based in Neath, currently playing in the Ardal SW, which is at the third tier of the Welsh football pyramid.
The club played in the Welsh Football League until 1997. After a season out of the league they rejoined for the 1998–99 season in Division Three where they remained until the end of the 2009–10 season when they left the league. The club then joined the Neath & District League.
For the 2020–21 season the club joined the newly formed Tier 4 West Wales Premier League.[1] The club merged with Onllwyn to become Seven Sisters Onllwyn AFC in a move announced by the club on 13 July 2020, with the first team to compete in the West Wales Premier League along with two teams in the Neath & District League.[2]
On 9 June 2022, the it was announced that the club had been promoted to the tier 3 Ardal SW League for the 2022–23 season via the vacancy route.[3]