Agnes Inglis (1870–1952) was a Detroit, Michigan-born anarchist who became the primary architect of the Labadie Collection at the University of Michigan.

After her mother's death, Inglis studied history and literature at the University of Michigan, receiving an allowance from her extended family.

While working in these settings, she became sympathetic to the condition of immigrant laborers in the United States, ultimately developing strong political convictions from the experiences.

She increased her radical activities with the onset of World War I, and used much of her time and family's money for legal support, particularly during the Red Scare of 1919–1920.

While the initial response was weak, over the next 28 years anarchists would donate an enormous volume of publications, writings, and documentary material to her collection.