Trinitarian commonly refers to ideas or things pertaining to the Trinity.

Trinitarian may also refer to:

• Trinitarianism, a Christian doctrine
• Trinitarian Order, a Roman Catholic mendicant order founded in 1198 by St. John of Matha
• A member of Trinity College, Cambridge
• A member of Trinity College, Oxford

• New Mexico State University Grants
• New Mexico State University Press
• New Mexico sunflower
• New Mexico Supreme Court Building
• New Mexico symbols
• New Mexico Taxation and Revenue Department
• New Mexico Territorial council
• New Mexico Territorial Council
• New Mexico Territory's At-large congressional district
• New Mexico True
• New Mexico True Television
• New Mexico v Mescalero Apache Tribe
• New Mexico v. Mescalero Apache Tribe
• New Mexico v Texas
• New Mexico Wing Civil Air Patrol
• New Mexico Wool Manufacturing Company
• New Mexico–Arizona Wool Warehouse
• New Mexico – Mi Lindo Nuevo Mexico
• New Miami High School
• New Microman
• New Middle Collegiate Church (New York City)
• New Middle East
• New Milford Hospital
• New millennium
• New Millennium Writings