The Cornell Daily Sun is an independent newspaper at Cornell University in Ithaca, New York. It is published twice weekly by Cornell University students and hired employees. Founded in 1880, The Sun is the oldest continuously independent college daily in the United States.

The Sun features coverage of the university and its environs. It prints on Wednesdays when the university is open for academic instruction. In addition to these regular issues, The Sun publishes a graduation issue, reunion issue, and a freshman issue, which is mailed to incoming Cornell freshmen before their first semester. The paper is free on campus and online. The Sun edits under its proprietary "Sun Style Guide," an amended version of AP Style.

Aside from a few full-time production positions, The Sun is staffed by Cornell students and is fully independent of the university. It operates out of its own building in downtown Ithaca. As of 2023, The Sun is ranked the third-best college student newspaper in the nation, behind Yale and Syracuse, according to College Choice's annual rankings.

The Cornell Daily Sun was founded in 1880 by William Ballard Hoyt to challenge Cornell's original and leading publication, the weekly Cornell Era, which was founded in 1868. In the newspaper's first edition, published on September 16, 1880, The Sun boasted in its opening paragraph: "We have no indulgence to ask, no favors to beg."

The newspaper later incorporated and changed to daily frequency, earning its longstanding boast "Ithaca's Only Morning Newspaper." In 1912, it added a second, "first collegiate member of the Associated Press."

Following the shift of its main competitor, The Ithaca Journal, from evening to morning daily publication in 1996, The Sun changed its traditional front page slogan which, after several iterations, now states "Independent Since 1880." This period also marked a shift in The Sun's content from national to local and university-related stories.

The newspaper's common features include "Around the Sun," a weekly multimedia recap series, and a sex column that appears weekly on Thursdays.

In January 2003, the Cornell Daily Sun Alumni Association purchased the former Elks Lodge in downtown Ithaca, erected 1916. Led by Stanley Chess, the founding president of the Association, John Schroeder '74, and Gary L. Rubin '72, the alumni completely renovated the building over the next several months. Now called the Cornell Daily Sun Building, it has housed the paper's offices since June 2003 and is coincidentally located next door to The Ithaca Journal's offices. The building also houses a kava bar in its basement.