Charlotte Kellogg (1874 – May 8, 1960), born Charlotte Hoffman in Grand Island, Nebraska, was a prominent author and social activist of the 20th century and the wife of American entomologist, Vernon Lyman Kellogg.
Kellogg studied at the University of California, Berkeley, earning a Bachelor of Philosophy in 1900.
After five years (1903–1907) as head of the English department at the Anna Head School in Berkeley California, Kellogg married Vernon Lyman Kellogg in Florence in 1908. Two years later, she gave birth to their only daughter, Jean Kellogg. She then traveled to Brussels with Jean in 1916 and worked with the Commission for Relief in Belgium for a year, on special request of the President. Kellogg studied the women of Belgium and later published Women of Belgium: Turning Tragedy to Triumph (1917), and Bobbins of Belgium (1920). When her husband was appointed by Herbert Hoover as an assistant to the United States Food Administration, Kellogg joined him in his work as an internationally active war relief speaker and fund raiser.
Some of Kellogg's most notable publications centered around her time spent in Belgium with her husband prior to America's entrance into World War I.
Kellogg was sent by Herbert Hoover and the Commission for Relief in Belgium specifically to document the experience and struggles of the women living in Belgium. According to President Herbert Hoover, who authored an introduction to Kellogg's 1917 publication , Kellogg did "more than record in simple terms passing impressions of varied facts of the great work of these women, for she spent months in loving sympathy with them." Kellogg also spent extensive time researching the Belgian Lace industry, publishing , a unique portrait of the women who worked in this industry, which suffered when Belgium faced occupation and the challenges of world war.