No. There are two kinds of historic property markers in Wilton.
Rectangular, beige markers inset with a bronze medallion have been obtainedfrom the Wilton Historical Society (a private, non-profit organization not affiliated with the Historic District and Properties Commission), and generally denote a structure listed in the 1989 Architectural Survey of the Town. Your house is automatically eligible for the Society’s marker if it appears on the Survey.
The other type of sign, a small blue oval with gold lettering, is from the National Register of Historic Places, maintained by the Department of the Interior, and is a designation of recognition and honor.