Lake of the Ozarks / Osage Region
Iberia was once Rocktown in the Miller County place-name record
SHSMO's place-name file records Iberia as a southern Richwoods Township town once called Rocktown for the large rocks around it.
Iberia gives southern Miller County a different kind of identity from the lake towns. The State Historical Society of Missouri’s place-name file describes Iberia as a town in southern Richwoods Township and says it was originally called Rocktown because of the large rocks fringing the town.
That is a small detail, but it is the kind of detail that makes a county page feel local. It connects the town name to terrain, old maps, post office history, and the Richwoods part of the county rather than to the lake.
For local-history writing, use SHSMO before repeating a popular explanation. The place-name file also warns against one tradition about the name, so it is better to keep the note to the sourced Rocktown detail.
References
Where this fits: this note belongs to Miller County. See every local note for the county on its page.