Ontario County Fair The Ontario County Fair is located on one hundred acres of level and well drained Ontario County farm land converted into a modern and up-to-date Fair Grounds with one of the best laid out Race Tracks in Western New York State. These Fair Grounds were developed through the cooperation and hard work of hundreds of Ontario County's public-spirited citizens. Parking facilities for thousands of cars. Grandstand with seating capacity of over 4,000 people, well lighted Race Track, Fair Grounds, sanitary toilet facilities and parking areas.