Walkerton is a town in the municipality of Brockton, Bruce County, Ontario, Canada. It is the site of Brockton's municipal offices and is the county seat. Walkerton is located on the Saugeen River, at the junction of King's Highway 9 and the former King's Highway 4 and is 75 km southwest of Owen Sound. As of 2011, the town had 4,967 people in the community. On January 1, 1999, Walkerton became part of the Municipality of Brockton. The town is notable for the 2000 Walkerton E. coli outbreak.