| Halldór Orri Björnsson | |
| Birth Date: | 2 March 1987 |
| Birth Place: | Reykjavík, Iceland |
| Height: | 1.85m |
| Position: | Attacking midfielder |
| Youthclubs1: | Stjarnan |
| Years1: | 2004–2013 |
| Clubs1: | Stjarnan |
| Caps1: | 161 |
| Goals1: | 58 |
| Years2: | 2010 |
| Clubs2: | → SC Pfullendorf (loan) |
| Caps2: | 7 |
| Goals2: | 0 |
| Years3: | 2014 |
| Clubs3: | Falkenbergs FF |
| Caps3: | 11 |
| Goals3: | 0 |
| Years4: | 2015–2016 |
| Clubs4: | Stjarnan |
| Caps4: | 40 |
| Goals4: | 9 |
| Years5: | 2017–2019 |
| Clubs5: | FH |
| Caps5: | 42 |
| Goals5: | 3 |
| Years6: | 2020–2021 |
| Clubs6: | Stjarnan |
| Caps6: | 27 |
| Goals6: | 2 |
| Nationalyears1: | 2012–2014 |
| Nationalteam1: | Iceland |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 0 |
Halldór Orri Björnsson (born 2 March 1987) is an Icelandic retired footballer who played as a midfielder.
Halldór played club football in Iceland, Germany and Sweden for Stjarnan, SC Pfullendorf, Falkenbergs FF and FH.
He earned two international caps for Iceland between 2012 and 2014.[1]
He retired from football in September 2021.[2]