Collettsville is an unincorporated community in Caldwell County, North Carolina, United States. It is part of the Hickory–Lenoir–Morganton Metropolitan Statistical Area. Although there are many houses made with a Gothic design, there are also many houses that look like cabins, built out of plain wood. Some houses are estimated to have been built as earl…Collettsville is an unincorporated community in Caldwell County, North Carolina, United States. It is part of the Hickory–Lenoir–Morganton Metropolitan Statistical Area. Although there are many houses made with a Gothic design, there are also many houses that look like cabins, built out of plain wood. Some houses are estimated to have been built as early as 1900 and are now occupied by locals.