Little is known about the life of Ottilie Johanna Wollmann. She grew up in Berlin, where she later studied sculpture under Fritz Klimsch and Max Kruse. In 1911 a sculpture of hers was shown at the first exhibition of the Die Juryfreien association in Berlin. From 1923 to 1932, Wollmann regularly participated in the Great Berlin Art Exhibition. In 1929, Wollmann joined the Society of Women Artists of Berlin.
In 1935, she was awarded a prize at an exhibition in the Jewish Museum in Berlin. After the National Socialists assumed power in 1933, she was persecuted for being Jewish. In July 1942 she was deported to the Theresienstadt Ghetto along with her mother, who was killed there. Wollmann herself was sent on to the Auschwitz concentration camp in October 1944, where she was murdered.