Joseph Alexander Altsheler (April 29, 1862 – June 5, 1919) was an American newspaper reporter, editor and author of popular juvenile historical fiction. He was a prolific writer, and produced fifty-one novels and (at least) fifty-one short stories.
In 1885, he took a job at the Louisville Courier-Journal as a reporter and later worked as an editor. He started working for the New York World in 1892, first as the paper's Hawaiian correspondent and then as the editor of the World's tri-weekly magazine. Due to a lack of suitable stories, he began writing children's stories for the magazine.
Altsheler died in New York City on June 5, 1919, aged 57; his obituary appeared in The Evening World, on June 6, 1919. His widow, Sarah, died 30 years later. Both are buried at the Cave Hill Cemetery in Louisville, Kentucky.