Constituent or constituency may refer to:

• Constituency, an electoral district or constituency
• Constituent, an individual voter represented by a elected official within an electoral district, organization, etc.
• Constituent state (territory, country, etc.): an administrative division of a larger state
• Constituent assembly, a body assembled for the purpose of drafting or revising a constitution

• Constituent (linguistics), a word or a group of words that function as a single unit within a hierarchical structure
• Constituent quark, a current quark with a notional "covering"

• Ingredient
• Part (disambiguation)