| Birth Date: | 1888 8, df=yes |
| Birth Place: | Plzeň, Austria-Hungary |
| Death Date: | January 1948 (aged 59) |
| Death Place: | Prague, Czechoslovakia |
| Position: | Goaltender |
| Ntl Team: | BOH |
| Ntl Team 2: | TCH |
| Career Start: | 1910 |
| Career End: | 1921 |
Karel Wälzer (28 August 1888 – January 1948) was a Czechoslovak ice hockey player who competed in the 1920 Summer Olympics, helping the Czechoslovakian national team win the bronze medal.[1] The main goaltender for the team, Wälzer broke his thumb prior to the start of the tournament, was unable to play the first two games, against Canada and the United States, returning for the final match against Sweden. Wälzer helped Czechoslovakia win, giving the team the bronze.