Clas Thunberg
| full name | Arnold Clas Robert Thunberg | |
| nationality | Finland (FIN) | |
| born | April 1893 | in Helsinki (Finland) |
| died | April 1973 | in Helsinki (Finland) |
| Navigation | Championships | World Records |
Championships - Medal table and top 10 positions
| kampioenschap | gold | silver | bronze | 4th-6th | 7th-10th | starts |
 Olympic Games | 5 | 1 | 1 | 0 | 0 | 8 |
| WCh Allround | 5 | 1 | 1 | 1 | 0 | 11 |
 ECh Allround | 4 | 4 | 0 | 0 | 0 | 10 |
Championships - Results
| year | position | championship | place | |
| 1922 | 3  | WCh Allround | Kristiania (Oslo) | NOR |
1  | ECh Allround | Helsinki | FIN | |
| 1923 | 1 | WCh Allround | Stockholm | SWE |
2  | ECh Allround | Hamar | NOR | |
| 1924 | 1 | Olympic Games Allround | Chamonix | FRA |
| 3 | Olympic Games 500 meters | Chamonix | FRA | |
| 1 | Olympic Games 1500 meters | Chamonix | FRA | |
| 1 | Olympic Games 5000 meters | Chamonix | FRA | |
| 2 | Olympic Games 10,000 meters | Chamonix | FRA | |
| NC | WCh Allround | Helsinki | FIN | |
| 2 | ECh Allround | Kristiania (Oslo) | NOR | |
| 1925 | 1 | WCh Allround | Oslo | NOR |
| 1927 | 2 | WCh Allround | Tampere | FIN |
| 2 | ECh Allround | Stockholm | SWE | |
| 1928 | 1 | Olympic Games 500 meters | St. Moritz | SUI |
| 1 | Olympic Games 1500 meters | St. Moritz | SUI | |
| 12 | Olympic Games 5000 meters | St. Moritz | SUI | |
| 1 | WCh Allround | Davos | SUI | |
| 1 | ECh Allround | Oslo | NOR | |
| 1929 | 1 | WCh Allround | Oslo | NOR |
| 2 | ECh Allround | Davos | SUI | |
| 1931 | 1 | WCh Allround | Helsinki | FIN |
| 1 | ECh Allround | Stockholm | SWE | |
| 1932 | 1 | ECh Allround | Davos | SUI |
| 1933 | 6 | WCh Allround | Trondheim | NOR |
| 1934 | NC13 | WCh Allround | Helsinki | FIN |
| NC15 | ECh Allround | Hamar | NOR | |
| 1935 | NC18 | WCh Allround | Oslo | NOR |
| NC11 | ECh Allround | Helsinki | FIN | |
