| Stefan Nagy | |
| Birth Date: | 31 July 1951 |
| Hometown: | Enkoping |
| Homecountry: | Sweden |
| Since: | 1981 |
| Laterality: | Right-handed |
| Music: | It Feels So Good by Sonique |
| Bdo: | 1990–2006 |
| Currentrank: | – |
| Bdo World: | Last 16: 2002 |
| World Masters: | Quarter Final: 1996 |
| World Darts Trophy: | Last 32: 2002 |
| Tournament: | Viking Masters Swedish Open |
| Resultyears: | 1995, 1996 2001 |
Stefan Nagy (31 July 1951 – 23 June 2016) was a former Swedish darts player who competed in British Darts Organisation events.
At the 1992 BDO World Darts Championship he was defeated 3–0 by Rod Harrington in the first round. 2002 saw Nagy's return to Lakeside, where he beat Gary Anderson in the first round 3-0 but lost in the last 16 to Wayne Mardle. He made his third and final appearance in 2003 where he lost in the first round to Andy Fordham.
Nagy's last tournament was the 2006 Finnish Open. Stefan Nagy had an accident with an electric motorbike in the summer of 2006 which left him paralyzed for six months (he broke his neck). He subsequently recovered sufficiently to be able to walk, but he was never able to play darts again due to his handicap.
Nagy died of cancer on 23 June 2016.