Tiantsoa Sarah Rakotomanga Rajaonah (born 15 December 2005) is a French professional tennis player.
She has career-high WTA rankings of 336 in singles, achieved on 2 December 2024, and 264 in doubles, attained on 2 December 2024.
In 2022, she won her first singles title in Valencia, Spain. A year later, she achieved her second victory in Melilla, Spain.
Rakotomanga Rajaonah won her first major ITF title at the W75 in Saint-Gaudens in the doubles draw, partnering Émeline Dartron.