Aaltje Noordewier Reddingius
- Category : 1868-births
- Type : GE
- Profile : 4/6 - Opportunistic / Role Model
- Definition : Triple Split
- Incarnation Cross : RAX Planning 3
Dutch classical soprano who had an active performance career in the concert repertoire from 1888 through the 1930s. She was also a celebrated voice teacher.
From 1886–1890, she studied at the Conservatorium van Amsterdam. In 1893, she married painter Michiel Noordewier. She was a mentor to singers such as Aafje Heynis, Erna Spoorenberg and Laurens Bogtman.
She died on 6 April 1949, aged 80, in Hilversum. Asteroid 677 Aaltje is named in her honour.