Iconium is an unincorporated community in St. Clair County, Missouri, with a population of 35 people. The town is perhaps best known for "Scott's Iconium Store," a local institution that is a frequent pilgrimage destination for Boy Scouts, many of whom refer to the town as "Ico" for short, and is well known for its Peach Nehi floats. The town is also very close to the H.