Ida Nilsen is a Canadian indie pop singer-songwriter and musician. She has been a member of the bands Radiogram, The Violet Archers, The Beans, The Gay, The Buttless Chaps and The Choir Practice, and has appeared as a guest musician on albums by P:ano, Jerk With a Bomb, Montag and Veda Hille.
She formed her own band, Great Aunt Ida, in 2003. That band released its debut album, Our Fall, in 2005. Great Aunt Ida's sophomore album How They Fly was released at the Railway Club in Vancouver on September 21, 2006. In a favourable review, critic Jennifer Van Evra wrote, "the album's simultaneously warm and spare arrangements give it an understated power".
In October 2007, Nilsen moved from Vancouver to Toronto, where she now resides. Great Aunt Ida plays monthly at the Tranzac Club, and includes members Dan Goldman on guitar, Ben Bowen on trumpet, former Rheostatics member Tim Vesely on bass, and Marshall Bureau on drums.