| Party: | Afrikaner Eenheidsbeweging |
| Citizenship: | South Africa |
| Birth Name: | Isak Dawid van Zyl |
| Birth Date: | 30 August 1944 |
| Otherparty: | National Party |
Isak Dawid van Zyl (born 30 August 1944) is a South African politician who represented the National Party in the National Assembly during the first democratic Parliament. He was elected in the 1994 general election[1] and was a member of the Standing Committee on Public Accounts.[2]
Van Zyl resigned from his seat near the end of the legislative term in order to defect to the new Afrikaner Eenheidsbeweging (AEB).[3] [4] In the 1999 general election, he stood as a candidate for the AEB, ranked second on the party's national list;[5] however, the party won only one seat, which went to party leader Cassie Aucamp.