An exit sign is a pictogram in a public facility (such as a building, aircraft, or boat) denoting the location of the closest emergency exit in case of fire or other emergency that requires evacuation. Most relevant codes (fire, building, health, or safety) require exit signs to be permanently lit.

Exit signs are designed to be absolutely unmistakable and understandable to anyone. In the past, this generally meant exit signs that show the word "EXIT" or the equivalent in the local language, but increasingly exit signs around the world are in pictogram form, with or without supplementary text.