The I Constitutional Government (Portuguese: I Governo Constitucional, Tetum: I Governu Konstitusionál) was the first Constitutional Government (administration or cabinet) under the Constitution of Timor-Leste (formerly known as East Timor).

Formed on 20 May 2002,[1] it was led by the country's second Prime Minister, Mari Alkatiri,[1] and was replaced by the II Constitutional Government on 10 July 2006.

[2] From 20 May 2002 until it was restructured on 26 July 2005, the government was made up of Ministers, Vice Ministers and Secretaries of State, as follows:[1] Following the restructuring on 26 July 2005, the government was made up of Ministers, Vice Ministers and Secretaries of State, as follows:[1]