公司法 是规范公司成立、运作以及组织解散的法律规定。 公司法规范了公司的组织及行为，保护了公司、股东及债权人的合法权益。

公司法的概念是由英国的普通法系而来，在二十世纪发展迅速。目前常见的公司形式如下：

• 独资企业，
• 合伙企业，
• 有限合伙，
• 有限责任合伙，
• 股份有限公司，
• 有限公司，
• 非牟利公司。

Corporate law (also "company" or "corporations" law) is the study of how shareholders, directors, employees, creditors, and other stakeholders such as consumers, the community and the environment interact with one another. Corporate law is a part of a broader companies law (or law of business associations). Other types of business associations can include partnerships (in the UK governed by the Partnership Act 1890), or trusts (like a pension fund), or companies limited by guarantee (like some community organizations or charities). Under corporate law, corporations of all sizes have separate legal personality, with limited or unlimited liability for its shareholders. Shareholders control the company through a board of directors which, in turn, typically delegates control of the corporation's day-to-day operations to a full-time executive. Corporate law deals with firms that are incorporated or registered under the corporate or company law of a sovereign state or their subnational states. The four defining characteristics of the modern corporation are: