File:IronGolemVillageBoundaries.png

Summary
These are the boundaries of what is considered the village (the Stone Brick/Glowstone line included). If the Iron Golem exits this area, it will no longer be attached to the village and a new Iron Golem will spawn (provided the spawn conditions for it to respawn are met). The Iron Golems encapsulated in glass are exactly outside of the boundaries.

The Iron Golems will never leave these boundaries when wandering - however, if they see a target outside the boundaries, they will ignore that rule and chase the mob, even outside the boundaries and that will also detach it from the village.

The area dimensions are 62x62. Additionally, 7+ levels below the house floor (4+ levels below the lowest spawnable floor) and 4+ levels above the house floor (2+ level above highest spawnable floor) are also outside of boundaries.