The Ontario and Quebec Railway (O&Q) was a railway located in southern and eastern Ontario, Canada.[1] It was initially chartered in March 1881 by managers of the Canadian Pacific Railway to run between Toronto and Perth, where it would connect, via a short branch line, to the CPR-controlled Brockville and Ottawa Railway. Construction began in 1882, and the line was completed in August 1884.
Starting in 1883, CPR began using the O&Q to build a network in southern Ontario to compete with the Grand Trunk Railway. The O&Q leased the Credit Valley Railway, Toronto Grey & Bruce, London Junction Railway and some sections of the Canada Southern Railway, building an extensive portfolio of routes. In August 1888 they provided a direct through route to Montreal by leasing the Atlantic and North-west Railway and connecting it to the O&Q via an extension from Smiths Falls to the Quebec border. A final major extension was the West Ontario Pacific Railway (WORP), which connected the Credit Valley in Woodstock