Article Four may refer to the 4th article of any regulatory document, such as:

• Article 4 of the European Convention on Human Rights
• Article Four (political party), political party in Sicily, Italy
• Article 4 of the Constitution of India, providing for amendments relating to states and union territories
• Article Four of the United States Constitution
• Article 4 direction, a local restriction on development rights in the United Kingdom
• Article 4 of the Constitution of Kazakhstan
• Article 4 of the Anglo-Iraqi Treaty of 1930
• NATO Article 4