Isidora Niemeyer Walbaum (born 26 December 2001)[1] is a Chilean rower.

Niemeyer competed at the Pan American Games in 2019, where she won a gold medal in the Women's Quadruple sculls event and a silver medal in the Lightweight Women's Double Sculls event,[1] and in 2023, winning a gold medal in the lightweight double sculls event[2] and a bronze medal in the eight event.

[3] She also competed at the 2018 Youth Olympics.

[4]