Gainsborough is a village in the Canadian province of Saskatchewan within the Rural Municipality of Argyle No. 1 and Census Division No. 1. A farming community, the village is located on Highway 18 in the southeastern corner of Saskatchewan. Gainsborough is approximately 6 kilometres from the Manitoba border, and 19 kilometres from the Nort…Gainsborough is a village in the Canadian province of Saskatchewan within the Rural Municipality of Argyle No. 1 and Census Division No. 1. A farming community, the village is located on Highway 18 in the southeastern corner of Saskatchewan. Gainsborough is approximately 6 kilometres from the Manitoba border, and 19 kilometres from the North Dakota, United States border. The first post office was established on April 1, 1884 as the community of Antler. On September 1, 1885, the name of the community changed to Gainsborough, after Gainsborough, Lincolnshire in England, which was the former home of J. J. Sadler, an early settler.