| Jón Rói Jacobsen | |
| Birth Date: | 1983 4, df=y |
| Birth Place: | Faroe Islands |
| Height: | 1.86m (06.1feet) |
| Position: | Defender |
| Clubnumber: | 4 |
| Years1: | 1999–2003 |
| Years2: | 2003–2004 |
| Years3: | 2004–2005 |
| Years4: | 2006–2008 |
| Years5: | 2008–2009 |
| Clubs2: | → Brøndby IF (loan) |
| Clubs5: | BK Frem |
| Caps1: | 52 |
| Caps2: | 4 |
| Caps3: | 42 |
| Caps4: | 23 |
| Caps5: | 14 |
| Goals1: | 25 |
| Goals2: | 0 |
| Goals3: | 5 |
| Goals4: | 1 |
| Goals5: | 1 |
| Nationalyears1: | 2001–2008 |
| Nationalteam1: | Faroe Islands |
| Nationalcaps1: | 36 |
| Nationalgoals1: | 0 |
| Pcupdate: | 13 February 2009 |
| Ntupdate: | 7 October 2007 |
Jón Rói Jacobsen (born 7 April 1983) is a former Faroese football defender.
Once hailed as Faroese most promising football talent, Jacobsen started his career as a striker for HB Torshavn, scoring 12 goals in the 2002 league season to end up 3rd in that seasons' goalscorers chart. His versatility gave him the chance to play in the Danish league, where he played for Brøndby IF and BK Frem before signing up for AaB Aalborg in 2006. He moved back to BK Frem in July 2008 with the hope to have more playing chances.[1]
Jacobsen made his debut for the Faroese national team in a June 2001 World Cup qualifying match against Switzerland, coming on as a substitute for Uni Arge. He collected 36 caps in total.[2] In 2008, 25-year-old Jacobsen retired from professional football, to fully concentrate on his medical studies in Copenhagen.