Laurie J. Marks (born 1957) is an American author of fantasy novels.
In 2003, her novel Fire Logic, the first in her Elemental Logic series, won the Gaylactic Spectrum Award for "best novel"; in 2005 Earth Logic, the second in the series, won the same award. She teaches writing at the University of Massachusetts Boston and lives with Deb Mensinger. In 2004, Marks and Mensinger married in Massachusetts. In 2007 she was Guest of Honor at the WisCon science fiction convention.