Newsday is an American daily newspaper that primarily serves Nassau and Suffolk counties on Long Island, although it is also sold throughout the New York metropolitan area. The slogan of the newspaper is "Newsday, Your Eye on LI", and formerly it was "Newsday, the Long Island Newspaper". The newspaper's headquarters is in Melville, New York, in Suffolk County. Newsday has won 19 Pulitzer Prizes and has been a finalist for 20 more.

As of 2009, its weekday circulation of 377,500 was the 11th-highest in the United States, and the highest among suburban newspapers. By January 2014, Newsday's total average circulation was 437,000 on weekdays, 434,000 on Saturdays and 495,000 on Sundays. As of June 2022, the paper had an average print circulation of 97,182.