Estradasphere was an experimental band that originated in Santa Cruz, California during the late 1990s. The band, which in its last incarnation was based in Seattle, consisted of 6 multi-instrumentalists from a variety of musical backgrounds trained in disciplines ranging from classical music and jazz to heavy metal.

In November 2007, members of Estradasphere started touring with Amanda Palmer of The Dresden Dolls, as well as helping to produce her debut solo album Who Killed Amanda Palmer.