Constitutional convention may refer to:

Constitutional convention (political custom), an informal and uncodified procedural agreement

Constitutional convention (political meeting), a meeting of delegates to adopt a new constitution or revise an existing constitution

Specific conventions

Constitutional Convention (Australia), any of four gatherings in 1891, 1897–98, 1973, and 1998

1998 Australian Constitutional Convention

Constitutional Convention (Ireland), established in 2012

Constitutional Convention (Philippines)

Scottish Constitutional Convention

Constitutional conventions of the United Kingdom

Icelandic constitutional convention, 2010–2013

Constitutional Convention (Chile), 2021–2022, drafting a new Political Constitution

United States

Constitutional Convention (United States), wrote the current U. S. Constitution in 1787

Convention to propose amendments to the United States Constitution, one of two processes for proposing amendments

Second Constitutional Convention of the United States, a proposal to reform and rewrite the Constitution

California Constitutional Conventions