The objective of this study is to add to the body of research concerning International Financial Reporting Standards (IFRS). To accomplish this objective, it will examine whether Canada’s adoption of IFRS, which replaced Canadian Generally Accepted Accounting Principles (GAAP), appears to affect the reported financial performance of Canadian public mining companies. Financial information for 2010 from the audited financial statements, as stated under IFRS and Canadian GAAP, were used to compute selected financial ratios. These financial ratios were tested to determine if statistically significant differences in their dispersion and central tendency resulted from adopting IFRS. It was found that no statistically significant differences existed in the dispersion of the ratios. However, statistically significant differences were found in the central tendency of three of the ratios: quick ratio, return on assets, and comprehensive return on assets. The results of this study will provide valuable information for investors, Canadian public mining companies, and government policy makers in other countries around the world.