| Oscar Geier | |
| Birth Place: | Zurich, Switzerland |
| Death Place: | Mountain Lakes, New Jersey, U.S. |
| Headercolor: | lightsteelblue |
| Show-Medals: | yes |
Oscar Arnold Geier (19 August 1882 - 5 November 1942) was a Swiss bobsledder who competed in the 1930s. He won the silver medal in the two-man event at the 1932 Winter Olympics in Lake Placid.
He was born in Zurich, Switzerland and died in Mountain Lakes, New Jersey.