Great Plain is an unincorporated area in the City of Danbury, Fairfield County, Connecticut.

It is located in the northeast section of the city, sharing a border with the Beaverbrook area of Danbury and Brookfield, CT. Named for its broad expanse, Great Plain gained a reputation for fruitful fields and prosperous farmers.

[3] At this time, Danbury was in the early stages of becoming the "Hat City of the World" [4] The small shop operated at Great Plain until the 1850s, when Mallory decided to relocate downtown.

Built in 1856, the Greek Revival one-room schoolhouse served the students of the Great Plain community until the 1940s.

In 1954 the City of Danbury transferred the building to the Great Plain District Association, a neighborhood organization with plans to convert it into a community center.