Cape Breton West is a former provincial electoral district in Nova Scotia, Canada that existed from 1933-2013. It elected one member to the Nova Scotia House of Assembly. In its last configuration, the district included much of the southern parts of the Cape Breton Regional Municipality including Sydney River, Port Morien and Louisbourg. The electoral district was abolished following the 2012 electoral boundary review and was largely replaced by the new electoral district of Sydney River-Mira-Louisbourg.