Vault-Tec bobbleheads are found on the eastern side of the former United States, in the regions of the Capital Wasteland, the Commonwealth and Appalachia. Bobbleheads were exclusive Vault-Tec merchandise available to executive-level employees of the Vault-Tec Corporation. They were also offered as a gift to individuals who had been accepted into Vaults.
In Fallout 3, regardless of where the bobbleheads are found, they all wear Vault 101 jumpsuits. In Fallout 4, they wear Vault 111 jumpsuits. In Fallout 76, they wear Vault 76 jumpsuits.
Although bobbleheads do not appear in Fallout: New Vegas, the snow globes serve as the game's collectibles, just as the bobbleheads do in Fallout 3 and Fallout 4, though the snow globes give no bonuses or affect the game in any way as the bobbleheads do.
The bobbleheads were also used as a Fallout 3 promotional item by Bethesda Softworks and are included in the Collector's Edition of the game. They are similar to the ones in-game but are shorter and in a generic standing-with-arms-folded pose.
Bobbleheads are also used as a promotional item for pre-orders of Fallout 4, this time all the different poses are available, although only one, random bobblehead is issued per pre-order.