Ohio State Route 330 is a very short north-south spur north from the Ohio Route 15 freeway to Ohio Route 568, passing through the town of Vanlue. The purpose of this route appears to be serving Vanlue with access to the state highway network. Ohio Route 330 runs in eastern Seneca County. The southern end is at an interchange with the freeway connecting Columbus to Findlay and points north; that freeway carries US Route 23, Ohio Route 15, and US Route 68 at different points. From that freeway, Ohio Route 330 runs north to Vanlue, and it continues for two more miles to the north. The northern end is at Ohio Route 568 between Carey and Findlay.