I created a new village and I currently have 11 villagers and 4 golems. That seems higher then expected. I am not sure if it makes a difference but this is on a server. I also have extra beds as I am trying to expand the village.
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duplicates
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This bug was already reported and is currently worked on, see MC-149443
We expanded an existing desert village and we can hardly move around becauseof the number of iron golems. Many too many.