Okeana, originally known as Tariff, is an unincorporated community in central Morgan Township, Butler County, Ohio, United States. It is located on Dry Fork Creek, a tributary of the Great Miami River, on State Route 126 about three miles northwest of Shandon in sections 21 and 26 of R1ET3N of the Congress Lands. It is a mile north of Alert, a mile east of Macedonia, and ten miles southwest of Hamilton.