Sarel van der Merwe, born December 5, 1946 is a former NASCAR driver from Port Elizabeth, South Africa. He is the only driver from that country, having competed in one Nextel Cup event in his career. That came in 1990, when der Merwe started at Watkins Glen in place of the ailing Darrell Waltrip. Starting 20th in the forty-car field, der Merwe had a decent debut. He crashed after seventy-seven laps, but that was still good enough for 24th.