Wickus Nienaber (born June 24, 1981) is a former Swazi swimmer, who specialized in breaststroke events. He is a four-time College Swimmer of the Year, a 2004 Atlantic Coast Conference champion, and owns at least 40 national age group records for the same stroke in Swaziland. He was a member of the swimming team for Florida State Seminoles under his coach Neil Harper, and a graduate with a Doctorate in computer science at the Florida State University in Tallahassee, Florida.