Inga Jacobi (2 July 1891 – 1937) was a German-born ballet dancer and choreographer who settled in Norway.
She was born in Magdeburg to engineer Bernhard Theodor Albert Jacobi and Ragna Hansen Mjøen, and was a cousin of actor Fridtjof Mjøen.
She settled Kristiania in 1915, and married art historian Henrik Grevenor in 1919.