The singer wrote a message "to New York and The American Red Cross" on her Little Monsters website to explain that she wants to help the place that shaped her as a "woman" and "artist".
© DROESE/SIPA/Rex Features
"Today I pledge 1 million dollars to New York & The American Red Cross for Hurricane Sandy Relief," she wrote.
"If it wasn't for NYC: the Lower Eastside, Harlem, the Bronx and Brooklyn, I would not be the woman or artist that I am today."
She continued: "New York is relentless ambition, a drive to succeed, a place where there is a natural pursuit of diversity through compassion.
"Please accept this gift on behalf of myself, my parents Joe and Cynthia, and my sister Natali; with our deepest gratitude New York for raising us. Thank you for helping me build my spirit. I will now help you rebuild yours. Sincerely, Lady GaGa and The Germanottas."
Simon Cowell recently donated $25,000 (£15,600) to the Hurricane Sandy relief effort, while the Jersey Shore cast will reunite for a fundraising special later this month.
Other celebrities who have offered their help to victims include Ben Stiller, Alec Baldwin and Russell Crowe, while ABC's 'Day of Giving' on November 5 raised $17m (£10.6m) and NBC's telethon on Friday (November 2) won $23m (£14.4m) in donations.
