| Sten De Geer | |
| Birth Date: | 1886 4, df=yes |
| Birth Place: | Stockholm |
| Death Place: | Gothenburg |
| Citizenship: | Sweden |
| Nationality: | Swede |
| Field: | Geography, Ethnography |
| Work Institutions: | Stockholms högskola Stockholm School of Economics Uppsala University Göteborgs högskola |
| Alma Mater: | Uppsala University |
| Father: | Gerard De Geer |
| Known For: | Baltoscandia Joint valley landscape Norrland terrain South Småland peneplain |
Sten De Geer was a Swedish professor of geography and ethnography.[1] As son of geologist Gerard De Geer Sten was born into the Swedish nobility holding the title of baron.[2]