Jacobine Susanne "Ina" Madsen (December 31, 1867 – August 19, 1935) was a Norwegian opera singer and voice teacher.

[6] She debuted on May 22, 1889 at the National Theater in Bergen in the role of Zerlina in Mozart's opera Don Giovanni.

She performed at the same venue in June 1889, together with Christian Zangenberg as Griolet, in the role of Stella in Jacques Offenbach's The Drum Major's Daughter.

[8] She received considerable praise for her aria interpretation of Donizetti's opera Lucia di Lammermoor in Germany.

She worked for many years as a voice teacher and concert singer in Berlin, where she lived during her married life.