Prime F. Osborn III Convention Center is a 265,000-square-foot (24,600 m2) convention center located in downtown Jacksonville, Florida. Opened in 1986, it was built incorporating Jacksonville Terminal Complex / Union Station as well as several thousand square feet of newly built structure.

Downtown Jacksonville is the historic core and central business district (CBD) of Jacksonville, Florida. It comprises the earliest area of the city to be developed and is located in its geographic center along the narrowing point of the St. Johns River.