Assembly may refer to:

• Deliberative assembly, An organization comprising members who use parliamentary procedure for making decisions
• Freedom of assembly, the individual right to come together and collectively express, promote, pursue and defend common interests
• General assembly (disambiguation), an official meeting of the members of an organization or of their representatives
• House of Assembly, a name given to the legislature or lower house of a bicameral legislature
• Legislative Assembly, the name given in some countries to either a legislature, or to one of its branches
• National Assembly, is either a legislature, or the lower house of a bicameral legislature in some countries
• Popular assembly, a localized citizen gathering to address issues of importance to the community
• Qahal, or assembly, an Israelite organizational structure

Assembly (englisch für „Baugruppe“) steht für:

• Assembly (Demoparty), eine jährliche Veranstaltung der Demoszene in Finnland
• .NET-Assembly, eine Zusammenstellung übersetzter .NET-Programmdateien
• Assembly Language, englisch für Assemblersprache, eine Programmiersprache
• The Assembly, ein Musikprojekt

L'Assembly (litt. l'assemblée) est un évenementiel annuel parmi les plus importants de la scène démo en Finlande. Les organisateurs principaux sont Pekka Aakko (Pehu du groupe Accession) et Jussi Laakkonen (Abyss du groupe Future Crew).

Assembly to piąty album studyjny norweskiej grupy muzycznej Theatre of Tragedy. Jest ostatnim wydawnictwem zespołu z udziałem Liv Kristine Espenæs Krull.

L'assembly, o linguaggio assemblatore (spesso chiamato impropriamente assembler) è, tra i linguaggi di programmazione, quello più vicino al linguaggio macchina vero e proprio.