Brighton, IndianaBrighton is an unincorporated community in Greenfield [Township, LaGrange County, Indiana|Greenfield Township], LaGrange [County, Indiana|LaGrange County], Indiana.HistoryBrighton was originally called Lexington, and under the latter name was laid out in 1836. A post office called Brighton was established in 1837, and remained in operation until it was discontinued in 1911.