In which Maine town is the novel "IT" primarily set?

Stephen King’s novel It is primarily set in the fictional Maine town of Derry.\n\nDerry is the home of the Losers’ Club, seven children who discover that an ancient, shapeshifting entity is preying on the town. The creature often appears as Pennywise the Dancing Clown, using fear to hunt children and manipulate the community.\n\nThe novel alternates between the Losers’ childhood in the late 1950s and their return as adults 27 years later, when the killings begin again. Derry’s history, disappearances, disasters, and silence from adults are central to the story rather than merely serving as scenery.\n\nDerry is fictional, but King modeled it largely on Bangor, Maine, his longtime hometown. It belongs to a recurring trio of invented Maine communities that also includes Castle Rock and Jerusalem’s Lot. Bangor is therefore an inspiration and a nearby real-world comparison, not the answer to the question. Salem’s Lot is another fictional King setting, while Castle Rock appears in several other works.