Gaby Diana Ahrens (born 15 March 1981 in Windhoek) is a Namibian sport shooter.

At the 2012 Summer Olympics, she was the Namibian flag-bearer, the first woman of her country to receive this honor.

At the 2016 Summer Olympics, she again competed in the women's trap, where she finished in 9th place, just one target off the finals.

She currently serves as Vice President on the Namibia National Olympic Committee and is an Athletes Representative of the Africa National Olympic Committee Association ANOCA and of the World Anti Doping Agency WADA.

Ahrens has a master's degree in sports management through the International Olympic Committee MEMOS in Lausanne, Switzerland.