Baldur Þór Ragnarsson
| Stjarnan | |
|---|---|
| Position | Assistant coach | 
| League | Úrvalsdeild karla | 
| Personal information | |
| Born | 23 February 1990 Iceland  | 
| Listed height | 183 cm (6 ft 0 in) | 
| Listed weight | 76 kg (168 lb) | 
| Career information | |
| Playing career | 2006–2017 | 
| Position | Point guard | 
| Number | 4 | 
| Coaching career | 2015–present | 
| Career history | |
| As a player: | |
| 2006–2017 | Þór Þorlákshöfn | 
| As a coach: | |
| 2015–2018 | Þór Þorlákshöfn (assistant) | 
| 2018–2019 | Þór Þorlákshöfn | 
| 2019–2022 | Tindastóll | 
| 2022–2024 | Ratiopharm Ulm (assistant) | 
| 2024–present | Stjarnan | 
| Career highlights | |
As player:
 As assistant coach: 
  | |
Baldur Þór Ragnarsson (born 23 February 1990) is an Icelandic basketball coach and a former player. He is currently the head coach of Stjarnan of the Icelandic Úrvalsdeild karla where he won the national championship in 2025.