Iberia is a city in southeast Miller County, Missouri, United States. The population was 703 as of the 2020 census. A post office called Iberia …Iberia is a city in southeast Miller County, Missouri, United States. The population was 703 as of the 2020 census. A post office called Iberia has been in operation since 1838. The community derives its name from the Iberian Peninsula perhaps via New Iberia, Louisiana.
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