Guysborough County

Guysborough County (Scottish Gaelic: Siorramachda' Mhainisdeir) is a historic county in the Canadian province of Nova Scotia. The area was first inhabited by the indigenous Mi'kmaq, and was colonized by France in the 17th century. Following the defeat of France in North America, the area was settled by loyalists after the American Revolutionary War. The county was created when it was split from Sydney County in 1836. Guysborough County was divided into two administrative districts with separate councils and courts in 1879: Guysborough and St. Mary's. The town of Canso was incorporated in 1901, followed by Mulgrave in 1923. Canso was dissolved as a town in 2012.

While there has been no county administration since 1879, Guysborough County exists as a census subdivision. As of 2021, Guysborough County had a population of 7,373, down from a peak population of 18,320 in 1901. The largest communities are Canso, Mulgrave, Sherbrooke, and Guysborough.