This document provides an overview of administrative rulemaking procedures in the United States. It begins by defining what constitutes a rule and the different types of rules. It then describes the key rulemaking procedures established by the Administrative Procedure Act (APA), including informal notice-and-comment rulemaking, formal rulemaking, and hybrid rulemaking. The document outlines the steps involved in both informal and formal rulemaking and discusses key Supreme Court cases that have shaped administrative rulemaking, such as Vermont Yankee Nuclear Power Corp. v. Natural Resources Defense Council. It concludes by covering negotiated rulemaking as an alternative procedure to notice-and-comment rulemaking established by the Negotiated Rulemaking Act of 1990.