| Åke Grönhagen | |
| Birth Date: | 24 January 1885 |
| Birth Place: | Stockholm, Sweden |
| Death Place: | Stockholm, Sweden |
| Sport: | Fencing, modern pentathlon |
| Club: | FFF, Stockholm IFK Stockholm |
| Show-Medals: | yes |
Åke Edvard Grönhagen (24 January 1885 – 25 December 1974) was a Swedish modern pentathlete and épée fencer who competed in the 1912 Summer Olympics.[1] He finished fourth in the Olympic modern pentathlon, and was eliminated in the first round of the individual épée competition.[2]
Grönhagen's grandson, Carl William "Bill" Gronhagen, was an air traffic controller at Los Angeles International Airport.