麦肯锡公司（英语：McKinsey & Company，简称麦肯锡）为一所由芝加哥大学会计系教授詹姆士.O.麦肯锡创立于芝加哥的管理咨询公司，营运重点是为企业或政府的高层干部献策、针对庞杂的经营问题给予适当的解决方案，有「顾问界的高盛」之称。麦肯锡的咨询服务如今已扩展到全世界各大企业，《科学》杂志伦敦记者戏称：「如果上帝决定要重新创造世界，祂会聘请麦肯锡。」《财星》杂志2014年「企管硕士最向往企业」调查，麦肯锡仅次于谷歌高居第二名。

McKinsey & Company is a worldwide management consulting firm. It conducts qualitative and quantitative analysis in order to evaluate management decisions across the public and private sectors. Widely considered the most prestigious management consultancy, McKinsey's clientele includes 80% of the world's largest corporations, and an extensive list of governments and non-profit organisations. More current and former Fortune 500 C.E.O.'s are alumni of McKinsey than of any other company, a list including Google C.E.O. Sundar Pichai, Facebook C.O.O. Sheryl Sandberg, Morgan Stanley C.E.O. James Gorman and many more. McKinsey publishes the McKinsey Quarterly, funds the McKinsey Global Institute research organization, publishes reports on management topics, and has authored many influential books on management. Its practices of confidentiality, influence on business practices, and corporate culture have experienced a polarizing reception.