Ontario is a wine-producing region located in Canada, known for its cool-climate wines. The region has a long history of wine production, dating back to the early 19th century. Ontario is home to several sub-regions, including Niagara Peninsula, Prince Edward County, and Lake Erie North Shore. The region is known for producing a wide range of wine styles, including Icewine, which is a sweet dessert wine made from grapes that have been frozen on the vine.