The company was incorporated in 2001 in Vancouver. On 11 October 2010, US variety store chain Dollar Tree, Inc. announced its acquisition of Dollar Giant for $52 million.
At the time of the acquisition, Dollar Giant had about 85 retail outlets in the provinces of British Columbia, Alberta, Saskatchewan and Ontario. Approximately 30 of its retail locations are located in British Columbia, making it the largest dollar store chain in that province. It was Canada's fourth largest operator of dollar stores. Dollar Tree has since rebranded most Dollar Giant stores to Dollar Tree.