Gog may refer to:

• Gog and Magog, an enigmatic Biblical pair often associated with apocalyptic prophecy.
• Gog (film) is a 1954 science-fiction film, directed by Herbert L. Strock and photographed in color and 3-D.
• Gog (comics), a DC Comics supervillain named after the Biblical entity.
• Gog Magog Downs, also called The Gogs, a range of low hills south of Cambridge, England.
• Gog (woreda) is a woreda (or district) in the Gambela Region of Ethiopia.
• Gog is also the name of a satiric book by Giovanni Papini published in 1931.
• Gog is also a term for people living in North Wales mostly used by those from South Wales and Cardiff in paticular.

• The Gynecologic Oncology Group, a non-profit organization researching gynecological cancers.
• The Great Outdoor Games, a series of outdoor sports games.

• Aniko Gog, Hungarian athlete.

GOG, Golden Open Gaming system, a pen and paper roleplaying system inspired by and under the same broad family as the d20 SRD from Wizards of the Coast.