Effect: Prices are permanently 5% better
Location: Longneck Lukowski's Cannery
There's a control room attached to the ceiling of the cannery. You can reach it by using the conveyor belts and walkway. The bobblehead is found on top of a broken terminal near a red steamer trunk.
Effect: +25% Critical damage with heavy weapons
Location: Vault 95
In the lower residential areas, find the room in the NE corner to find this bobblehead sitting on top of the radio in the center table.
Effect: +25% Critical damage with energy weapons
Location: Fort Hagen
This is found in the Command Center, the underground portion of Fort Hagen which will be accessible only during the quest Reunions. Continue deep inside and you'll run into a kitchen/dining hall. You'll find the bobblehead on the metal table between two fridges in the kitchen.
Effect: +15% explosive damage
Location: Saugus Ironworks
In the Saugus Blast Surface, if you missed it during the quest, you can find the Explosive Bobblehead beside the steamer trunk in the upper walkway.
Effect: Lockpicking is permanently easier
Location: Pickman Gallery This is found in the same room where you'll find Pickman about to be executed by raiders. This is found on the ground, beside the pillar and burning trash bin in the middle of the room.
Effect: Stimpaks heal 10% more HP
Location: Vault 81
This is found in the secret area of Vault 81 which can accessed during the quest Hole in the Wall. It's inside the same room where you'll find Curie.
Effect: +25% Critical damage using melee weapons
Location: Trinity Tower
This is found inside the holding cell in the rooftop of the tower where you'll find Strong and Rex Goodman during the quest Curtain Call.
Effect: Fusion cores last 10% longer
Location: Corvega Assembly Plant
The Repair Bobblehead can be found on the rooftop of the building. There are multiple exits to the rooftop. The easiest one is from the main entrance, take the catwalk to the second floor door. Once inside, you'll find the door with the red mark “Exit”. From there, you have to make your way to the large blue sphere to the south. The bobblehead is found at the end of the topmost walkway.
Effect: One extra guess/attempt when hacking
Location: Malden Middle School (Vault 75)
This is found in the observation room where you'll find the Vault 75 Admin Access Card. Refer to this quest's walkthrough for the complete direction.
Effect:+25% Critical damage to ballistic guns
Location: Gunners Plaza
After getting the key either from Cruz or Ryder, enter the Recording Room and kill everyone inside, including Captain Wes. You can also loot the the Small Guns bobblehead in the middle of the counter. Loot Wes's safe key from his body and use it to open his safe. There's also a green steamer trunk that you can loot. After clearing this room, you're practically done with the place.
Effect: Harder to detect by 10%
Location: Dunwich Borers
Found in the deepest part of the cavern in Station 4. It's sitting on a table beside a terminal. Refer to the location's page for more information.
Effect: +100 caos to all vendors
Location: Vault 114
Found in the Overseer's room, on the desk. This is the same room where Nick Valentine is held captive.
Effect: +25% critical damage with unarmed attacks
Location: Atom Cats Garage
This is found on the hood of a wrecked car inside the garage in the Atom Cats compound.