The 15th Legislature of the Third Portuguese Republic (Portuguese: XV Legislatura da Terceira República Portuguesa) ran from 28 March 2022 to 15 January 2024.

The composition of the Assembly of the Republic, the legislative body of Portugal, was determined by the results of the 2022 Portuguese legislative election held on 30 January.

[2] On 9 November 2023, the President of the Republic Marcelo Rebelo de Sousa announced the dissolution of the 15th Legislature, following the resignation of Prime Minister António Costa due to the Operation Influencer corruption investigation, and called for a snap election for 10 March 2024.

[4] The 16th Portuguese legislative election was held on 30 January 2022.

[5] Following President of the Assembly Eduardo Ferro Rodrigues' decision of not contesting the 2022 legislative election,[10] the Socialist Party (PS) nominated Augusto Santos Silva as their candidate for President of the Assembly of the Republic.