| Gerrit Joseph Radstaak | |
| Birth Date: | 4 September 1914 |
| Birth Place: | Winterswijk, the Netherlands[1] |
| Death Date: | [2] |
| Office: | Member of the Legislative Assembly of Alberta |
| Constituency: | Strathcona South |
| Term Start: | May 23, 1967 |
| Term End: | August 30, 1971 |
| Predecessor: | New District |
| Successor: | District Abolished |
| Party: | Social Credit |
| Occupation: | politician |
Gerrit Joseph Radstaak (September 4, 1914 – May 1, 1996) was a politician from Alberta, Canada. He served in the Legislative Assembly of Alberta from 1967 to 1971 as a member of the Social Credit Party.
Radstaak first ran for a seat in the 1967 Alberta general election as the Social Credit candidate in the new electoral district of Strathcona South. He defeated Progressive Conservative candidate Oscar Kruger, a former player for the Edmonton Eskimos, and two other candidates with 40% of the popular vote.[3]
Strathcona South was abolished in the 1971 boundary redistribution, and Radstaak ran for re-election in the new electoral district of Edmonton-Avonmore in the election held that year. He was defeated by Progressive Conservative candidate Horst Schmid.[4]
Radstaak ran again in the 1975 general election and was again defeated by Schmid in a landslide.[5]