Gonçalo Byrne, GCIH (b. Alcobaça 1941) is a Portuguese architect.

Byrne is responsible for a vast accomplishment of architectural work, and has been awarded with many national and international prizes.

In 2005 he was awarded the title of Doctor Honoris Causa from the Lisbon Faculty of Architecture, Technical University of Lisbon, and was awarded the Grand Cross of the Order of Santiago da Espada by the President of the Portuguese Republic. Included in his diversified body of work, in terms of scale, theme and programme, the more relevant examples are the recent interventions in the Monastery of Alcobaça and its surrounding areas, the building for the Headquarters of the Government of the Province of Vlaams-Brabant in Leuven, Belgium, the Marine Traffic Control Tower for the Port of Lisbon Authority, the "Império" Quarter in the Chiado area of Lisbon, the Faro Theatre in the Algarve, and the National Museum Machado de Castro, in Coimbra, this latter project currently under construction.

Within the area of urban planning he carried out the Detailed Plans for the surrounding areas of the Ajuda National Palace, in Lisbon, for the Higher City University, in Coimbra, for the "Cava do Viriato" within the scope of the Polis Programme, in Viseu, as well as the Plan for the Town of Trancoso, this within the scope of the Programme for the Historical Villages of Portugal. He is currently developing relevant projects such as the Estoi Inn & Charm Hotel, in the Algarve, the Viseu Inn, the Estoril – Sol Building Complex, the "Jade" Building Complex in Lisbon, the New Central Laboratory for EPAL (Lisbon Water Distribution Company) and several single family villas in the Bom Sucesso Resort in Óbidos.