Romia is an unincorporated community in Bryan County, Oklahoma, United States. It had a post office from August 30, 1915 until June 30…Romia is an unincorporated community in Bryan County, Oklahoma, United States. It had a post office from August 30, 1915 until June 30, 1934. Romia was named after Romia Lewis, the daughter of the first postmaster, Ollie E. Lewis.