Erika Giesen is a professional bodybuilder from Australia.
Giesen's greatest success was winning the first Ms. International contest in 1986.
Giesen runs now a cattle station with her husband in Queensland Australia.
Giesen was the first bodybuilder to win the Ms. International. She is currently the most successful Australian bodybuilder of all time.
| colspan = 3 align = center | Ms. International |- | width = 30% align = center | Preceded by:<br/>- | width = 40% align = center | First (1986) | width = 30% align = center | Succeeded by:<br/>Cathey Palyo