is a census-designated place (CDP) in Trumbull County, Ohio, in the United States. As of the 2000 census, the CDP population was 994. It is commonly prounounced , with a long "i" sound as opposed to the long "e", by local residents.
Vienna Center is part of the Youngstown–Warren–Boardman, OH-PA Metropolitan Statistical Area.
According to the United States Census Bureau, the CDP has a total area of 4.2 square miles (11.0 km²), all of it land.
The ZIP code of its post office is 44473, but under the name of Vienna, rather than Vienna Center.