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Delta is the third studio album by Australian singer Delta Goodrem. It was released in Australia on 20 October 2007 through Sony BMG. Goodrem began work on the album in 2006 and collaborated with several writers including Vince Pizzinga, Tommy Lee James, Jörgen Elofsson, Richard Marx, Stuart Crichton and major contributions by Brian McFadden. The album debuted at No. 1 in Australia, making it her third consecutive chart-topping album there. The album was also released in the United States, by Mercury Records, making it Goodrem's first album to be released there.

After the release of her second album Mistaken Identity in 2004, Delta reflected that the album was rushed - written and recorded while she was still recovering from chemotherapy for Hodgkin's lymphoma. Goodrem remarked that she felt overexposed and claimed, "I'd burnt myself out. By the end of 'Mistaken Identity' I thought, 'This is nothing of what I am. I know I can do all of this a lot better'." After a period of being angry, Delta felt she was healed and embraced herself and being in the public eye. Therefore, she started developing a new album, stating, "For a while I was writing songs for this album I didn't want to talk about things, so I didn't want to write about them either. "I had to get over a couple of things. My parents divorced, there was a lot going on. But now I truly am inspired again. I feel regenerated. I feel I've got my energy back."

Initially, the album's original working title was "Condition of a Heart", however she claimed she didn't want a complicated album, claiming, "I want people to take this album home and wrap it around their own lives the way they did with 'Innocent Eyes'." She also claimed that the new album was going to be lighter than her previous work. The newspaper Sydney Morning Herald revealed that the album was going to be "a more upbeat, inspirational tone in her pop music." In contrast to her previous album, which was darker because Goodrem had written about her cancer battle, Delta reflects changes in her personal life; her parents had divorced, she let her mother Lea stand down as her manager as well as discussed her relationship with pop-singer Brian McFadden, whom Delta co-wrote the majority of the songs on the album.

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