The name of the new town is a portmanteau of the names of William Westgate and William Lockhart, who owned the property. Westlock was incorporated as a village on 16 March 1916, with a population of 65 residents. The first reeve was George MacTavish, and in that same year, the first grain elevator was built. The first bank branch, the Merchant's Bank opened its doors in 1918. A permanent brick schoolhouse was built in 1925. The Sisters of Charity of St. Vincent de Paul of Halifax operated a hospital out of a former house in 1927, and a purpose-built hospital, the Immaculata, was opened in 1928. Westlock became a town on 7 January 1947 with a population of 854. That same year, the Memorial Hall was also built.