Applying for F2 Visa while Visiting Family in Canada

No, one cannot apply for an F2 visa while visiting family in Canada on a visitor visa. The F2 visa is a U.S. visa for dependents of F1 visa holders (students). To apply for an F2 visa, the applicant must do so through a U.S. consulate or embassy outside of the United States, usually in their home country or country of residence. Since the person is not a resident of Canada, they would need to return to their home country to apply for the F2 visa.