Galaxy Magazine, or The Galaxy, was an American monthly published from 1866 to 1878.
It was founded by William Conant Church and his brother Francis P. Church. Mark Twain wrote about 10 pages an issue, for all but one of twelve consecutive months in 1870 and 1871, and wrote stories for it on three occasions before or after.
When it ceased publication, its subscription list was sold to the Atlantic Monthly.