2886 Piney Wood Drive as Henderson House
Dustin sneaks his new friend into the house and feeds it some Three Muskateers.
“Chapter Three: The Pollywog” Filming Locations
Dustin shows the Party his new friend while Eleven goes on a walkabout.
Stranger Things episode “Chapter Three: The Pollywog” was filmed in Atlanta, Jackson, Douglasville, & Stockbridge in the United States of America.
Butts County Courthouse as Hawkins Public Library (exterior)
Dustin goes to the library to get books about reptiles.
East Point's Historic Civic Block as Hawkins Public Library (interior)
Dustin tries to check out a stack of books to help with his research into the creature but finds he already has too many books out.
Source: Stranger Things — Wikia
Patrick Henry High School as Hawkins Middle School
Dustin shows up to class late and invites his friends to meet in the AV room to show off his creature.
48 Pray Street as Hawkins Police Department
Hopper examines the map of the blight and realizes it is centering around the laboratory.
Patrick Henry High School as Hawkings High School
Steve is playing basketball against Billy who is being an ass and then he goes outside with Nancy and tells her about the night before.
Jackson Drug as Melvald's General Store
Bob comes to have lunch with Joyce and they discuss how he fits into her life.
Building A (Emory University) as Hawkins National Laboratory
Hopper brings the map of diseased plants to Dr. Owens to show him that the blight is centering on the lab.
Source: IMDb
Sleepy Hollow Farm as Merrill's Farm
Dr. Owens and the team from the lab collect samples of the blight.