| Atli Danielsen | |
| Fullname: | Atli Danielsen |
| Birth Date: | 1983 8, df=y |
| Birth Place: | Faroe Islands |
| Position: | defender midfielder |
| Currentclub: | KÍ Klaksvík |
| Clubnumber: | 8 |
| Youthclubs1: | KÍ Klaksvík |
| Years1: | 2000–2006 |
| Years2: | 2005 |
| Years3: | 2007–2009 |
| Years4: | 2009 |
| Years5: | 2009–2011 |
| Years6: | 2011–2012 |
| Years7: | 2013– |
| Clubs2: | →Sogndal Fotball (loan) |
| Clubs5: | FC Roskilde |
| Clubs6: | B36 Tórshavn |
| Clubs7: | KÍ Klaksvík |
| Caps1: | 130 |
| Caps2: | 2 |
| Caps3: | 60 |
| Caps4: | 13 |
| Caps5: | 38 |
| Caps6: | 27 |
| Caps7: | 63 |
| Goals1: | 24 |
| Goals2: | 0 |
| Goals3: | 3 |
| Goals4: | 2 |
| Goals5: | 2 |
| Goals6: | 1 |
| Goals7: | 9 |
| Nationalyears1: | 2003– |
| Nationalteam1: | Faroe Islands |
| Nationalcaps1: | 42 |
| Nationalgoals1: | 0 |
| Pcupdate: | 18 November 2015 |
| Ntupdate: | 9 September 2011 |
Atli Danielsen (born 15 August 1983) is a Faroese footballer who currently plays for KÍ Klaksvík in the Premier League of the Faroe Islands.
Danielsen started with KÍ Klaksvík, playing his first game in their 2000 league season. After he became a regular in the national team he was loaned to Norwegian side Sogndal before he signed for Danish outfit Boldklubben Frem. In the wintertransfer 2010, he signed FC Roskilde.
Danielsen is a regular in the Faroese national team. He made his debut in April 2003 in friendly match against Kazakhstan, coming on as a substitute for Hans Fróði Hansen.