Iron Door is a strong and secure door in Minecraft made from iron ingots. Unlike wooden or copper doors, it cannot be opened by hand and requires redstone power to function. It is also immune to zombie breaking, fire, and lava, making it ideal for fortified structures.

Iron doors are naturally generated in strongholds and prison rooms in woodland mansions. Players can craft them using 6 iron ingots, producing 3 iron doors. They function as a redstone component, requiring a button, lever, pressure plate, or redstone signal to open and automatically close when power is removed. Additionally, in Java Edition, iron doors can be used as air pockets underwater, making them useful for underwater exploration.