LAH may refer to:
- Last Action Hero, a 1993 American action-comedy film
- Left Anterior Hemiblock, a type of left anterior fascicular block
- Leigh Ann Hester, an American soldier during the Iraq War who was awarded the Silver Star medal
- Lithium aluminum hydride, an inorganic compound used as a reducing agent
- 1st SS Division Leibstandarte SS Adolf Hitler, the German chancellor's bodyguards during World War II