The village of Unionville was first recognized as such by the U.S. Postal Offices in 1834. Prior to that date, it was called Langdon Quarter or Union district. Located at the west end of Farmington, it gained its manufacturing stature in the Farmington Valley by producing a variety of goods. Located along the Farmington River, its residents took full advantage of its power by diverting it into canals to power numerous factories and mills. Eventually, the factories have switched to the use of steam power in operation of their mills. By the 1850s, there were many factories or shops operating and producing goods such as clocks, writing paper, wooden and tin buttons, saws gun stocks, furniture, knives, paper boxes, caskets, flutes, oyster tongs, nuts, bolts and wooden screws. An influx of Irish, Italian and Slavic immigrants in the mid 19th century attracted by the opportunities of work increased the village’s population and provided for its further growth. The factories prospered well into the 20th century. The flood of 1955 had wiped out much of the center of Unionville and the neighborhoods located by the river bank. A redevelopment project in the 1960s changed the village’s industrial character from an industrial village to a suburban center.