Spanish Lake is an unincorporated community and census-designated place (CDP) in Spanish Lake and St. Ferdinand townships, St. Louis County, Missouri, United States. The population was 18,413 at the 2020 census.
Geography
The Spanish Lake community is located in the northeastern portion of St. Louis County. The community is bounded by the Mississippi River to the east, the Missouri River to the north, Highway 367 to the west, and Interstate 270 to the south.
According to the United States Census Bureau, the CDP has a total area of , of which is land and , or 2.13%, is water.
History
Spanish Lake, originally called Spanish Pond until the late nineteenth century, was named after the Spanish troops who stayed there while building a fortified post for Spain in 1768. Much of the area was once the property of James De St. Vrain, a brother of the last Spanish lieutenant governor of Upper Louisiana. It was in this district, near Spanish Pond, that an old log cabin, said to have been used as a government building by Lieutenant Governor De Lassus De St. Vrain, the last Spanish executive to rule this section, was erected.