1909 establishments in the United States

The National Association for the Advancement of Colored People (NAACP) is an American civil rights organization formed in 1909 as an interracial endeavor to advance justice for African Americans by a group including W. E. B. Du Bois, Mary White Ovington, Moorfield Storey, Ida B. Wells, Lillian Wald, Emil G. Hirsch and Henry Moskowitz. Over the years, leaders of the organization have included Thurgood Marshall and Roy Wilkins. The NAACP is the largest and oldest civil rights group in America.

Mycologia is a peer-reviewed scientific journal that publishes papers on all aspects of the fungi, including lichens. It first appeared as a bimonthly journal in January 1909, published by the New York Botanical Garden under the editorship of William Murrill. It became the official journal of the Mycological Society of America, which still publishes it today. It was formed as a merger of the Journal of Mycology (14 volumes; 1885–1908) and the Mycological Bulletin (7 volumes; 1903–1908). The Mycological Bulletin was known as the Ohio Mycological Bulletin in its first volume.

US presidential administration from 1909 to 1913

U.S.-based news agency

dog breed registry

U.S. Army medal