The Avon Park Formation is a Middle Eocene geologic formation and is the oldest exposed sediments in Florida, United States.

Period: Paleogene Epoch: Middle Eocene~55.8 to 33.9 mya, calculates to a period of 21.9 million years Faunal stage: Clarkforkian through early Chadronian The Avon Park formation is located on the crest of the Ocala Platform in Levy County with three distinct outcroppings.

The Avon Park Formation consists of cream to light-brown or tan, poorly hardened to very hard, grainstone, packstone and wackestone, with rare mudstone.

These limestones are interbedded with vuggy dolomites which are soft to very hard and tan to brown, very fine to medium crystalline structure.

Parts of the Avon Park Formation comprise important, subregional confining units within that system.