Zog or ZOG may refer to:
- ZOG (hypertext), an early hypertext system developed at Carnegie Mellon University during the 1970s
- Zog of Albania (1895–1961), King of Albania from 1928 to 1939
- Zionist Occupation Government, an antisemitic conspiracy theory about Jews dominating governments
- A planet in the Murderous Maths series
- A planet where Zig and Zag (puppets) come from
- A soldier in the Teenage Mutant Ninja Turtles universe
- The boss/enemy in the Super Nintendo/Nintendo Game Boy Advance game Breath of Fire
- A character in a sub-plot in the Kurt Vonnegut novel Breakfast of Champions