East Granby is a town in Hartford County, Connecticut, United States. The population was 5,214 at the 2020 census. History Original inhabitants of the current East Granby area were Native American peoples, including the Algonquin/Poquonock, the Massaco, and the Agawam. The East Granby area was first settled by Europeans in 1664, which was one of the four Congregational parishes in Simsbury. The Turkey Hills Ecclesiastical Society in 1786 became a section of Granby, and in 1858 was incorporated as the Town of East Granby. The first incorporated copper mine in America resided in what is now East Granby. The mine later became Old Newgate Prison, a Revolutionary War jail and the first state prison in the United States (1790). Farming was the mainstay of the town for much of its history. The early twentieth century saw local farmers specializing in dairy product and tobacco. East Granby experienced a housing boom that started in 1951 and resulted in a rise in population. The town celebrated its 150th anniversary with a three-day festival June 7–9, 2008. Geography East Granby is in the Farmington valley, with the Farmington River passing along the southern border of the town. The Metacomet Ridge, a mountainous trap rock ridgeline that stretches from Long Island Sound to nearly the Vermont border, runs through the center of the town, cutting off Salisbury Plain to the east, which used to lie under the ancient, glacial Lake Hitchcock. High points on the Metacomet Ridge in East Granby include Hatchet Hill and Peak Mountain; the latter offers a bird's eye view of the historic Old Newgate Prison. The Metacomet Trail traverses the ridge. Demographics As of the census of 2014, there were 5,055 people (2012) and 2,129 households (2012). The population density was (2012). There were 2,186 housing units. The racial makeup of the town was 86.7% White, 5.28% African American, 0% Native American, 5.66% Asian, 2.35% from other races or multi-race residents. Hispanic or Latino of any race were 3.9% of the population. The town the population was spread out, with 22.5% under the age of 18, 4.85% from 18 to 24, 35.55% from 25 to 49, 22.5% from 50 to 64, and 6% who were 65 years of age or older. 47.85% of the population is female (52.15% male). Residents that were 18 years or older compromised 77.47% of the population. 49.46% of residents that were 18 years or older