Marcus Henry Kellogg was a newspaper reporter killed at the Battle of the Little Bighorn. Kellogg rode with George Armstrong Custer during the battle. His dispatches were the only press coverage of Custer and his men in the days leading up to the battle. As a newspaper stringer whose reports were picked up around the country, Kellogg is considered the first Associated Press correspondent to die in the line of duty.

The Associated Press (AP) is an American not-for-profit news agency headquartered in New York City. Founded in 1846, it operates as a cooperative, unincorporated association, and produces news reports that are distributed to its members, major U.S. daily newspapers and radio and television broadcasters. Since the award was established in 1917, the AP has earned 58 Pulitzer Prizes, including 35 for photography. The AP is also known for its widely used AP Stylebook, its AP polls tracking NCAA sports, and its election polls and results during US elections.