This chapter outlines the development of English dictionaries in Canada as expressions of the national variety of Canadian English. Four stages of dictionary development in Canadian English are identified. The role of and dependency on publishing houses in the field's development is surveyed. This dependency led, ultimately, to what is called the Great Canadian Dictionary War. A handful of less widely known dictionaries that were important in Canada’s lexicographical development are discussed in some detail, and numerical methods are used to analyse developments within the Canadian dictionary market since the late 1970s.