Frontenac is a wealthy inner-ring suburb of St. Louis, located in St. Louis County, Missouri, United States. The signature landmark is Plaza Frontenac, a high-end mall featuring many prominent retailers such as Saks Fifth Avenue, Neiman Marcus, and Tiffany & Co., among others. The population was 3,482 at the 2010 census.
The community name is inspired by the New France governor Louis de Buade de Frontenac. Benjamin and Lora Wood, who laid out the community's core called Frontenac Estates, that consisted of 26 two-acre estates, had made frequent trips to Quebec. The community was incorporated as 217 acres (88 ha) in 1947 and annexed another 967 acres (391 ha) in 1948. The community still consists mostly of houses on one-acre lots. French architecture is encouraged in design.
Frontenac is located at 38°38′2″N 90°25′4″W (38.633752, -90.417901).
According to the United States Census Bureau, the city has a total area of 2.88 square miles (7.46 km2), all land.
As of the census of 2010, there were 3,482 people, 1,267 households, and 1,036 families living in the city. The population density was 1,209.0 inhabitants per square mile (466.8/km2).