The new album is a follow-up to the 2010 record We Are Born. 1000 Forms of Fear is expected to be released in June, according to The New York Times.
Sia unveiled the music video for her latest track 'Chandelier' earlier this month, with an official single release also coming in June.
The clip featured Sia portraying an invisible woman, with only her floating bob haircut and red hi-top shoes being visible.
Sia first hinted that she would release new material in 2014 back in early March.