Marriage—also known as matrimony or wedlock—is the legal and cultural process by which two people join their separate lives as one. The contractual rights and obligations of the parties to a marriage are generally defined by the state, as provided in the state’s statutes (often in the family code), unless otherwise agreed by the parties in a prenuptial or postnuptial agreement. Marriage is intended to last until death, but is often terminated sooner by separation or divorce.

In Wyoming, marriage is recognized as a legal union between two individuals, which is intended to merge their lives into a single social and economic entity. The rights and obligations of the parties in a marriage are primarily governed by Wyoming state statutes, which can be found in the state's family code. These statutes outline the legal requirements for entering into a marriage, such as age, consent, and licensing, as well as the grounds and procedures for separation and divorce. While marriage is intended to be a lifelong commitment, it can be dissolved before death through legal separation or divorce, with the state providing the framework for the division of marital property, alimony, child custody, and support. Parties entering into marriage in Wyoming also have the option to create prenuptial or postnuptial agreements, which allow them to define their own terms regarding the division of assets and financial responsibilities, provided these agreements meet legal standards and are not in violation of public policy.