Veintitrés (meaning Twenty-three in English) was a weekly print news magazine published in Buenos Aires, Argentina.

The magazine was established in 1998 as XXI, in reference both to the upcoming century, and to Lanata's previous publication Página/12 (21 is 12 with the figures reversed), by Jorge Lanata and colleagues from the television news magazine, Día D: Adolfo Castelo, Olga Gatti, Claudio Martínez, Jorge Repiso, Ernesto Tenembaum, and Marcelo Zlotogwiazda.

Much as Lanata's successful news daily, Página/12, had done, Veintitrés adopted a format of bold headlines and graphics, as well as a muck-raking editorial style.

Its target audience is the middle and high socioeconomic classes and professionals, government officials, and students.

[6] In October 2016 the last print edition of Veintitrés published, and the magazine was made an online publication.