| Birth Date: | 5 January 1894 |
| Birth Place: | Falkenberg, Sweden |
| Death Date: | 28 April 1944 (aged 50) |
| Death Place: | Klippan, Skåne, Sweden |
| Sport: | Horse riding |
| Club: | K5 IF, Helsingborg K2 IF, Helsingborg |
| Show-Medals: | yes |
Ernst Johan Emanuel Hallberg (5 January 1894 – 28 April 1944) was a Swedish Army officer and horse rider who competed in the 1928 and 1932 Summer Olympics. In 1928 he and his horse Loke finished 25th in the individual jumping and won a bronze medal with the Swedish jumping team. Four years later he finished fifth in the individual jumping on Kornett and in the individual eventing on Marokan.
Hallberg was major in the Swedish Army.[1]