The famous person Eugene Duchamp DeChastaignier is associated with one of more of the St. Martin County historic places.
Some of the country's most noteable architects helped create the St. Martin County places including Robert R. Benson, Alexander Devince, Joseph Devince, Jean Pierre Vasseur, Nolan & Torre, unknown, Edmond Pellerin, Henri Penne, Martin M. Voorhies and Emile Bergeron. Prominent architectural styles found in St. Martin Country are Queen Anne, Stick/Eastlake and Greek Revival.