Guillermo Narvarte (born 29 April 1965) is an Argentine professional basketball coach. He is currenrly the head coach of Argentine team Club La Unión in the Liga Nacional de Básquetbol.
Narvarte started his coaching career in Argentina with Independiente de Neuquén. He was the assistant coach of the Argentine National Team which won the bronze medal in the 2008 Beijing Olympics. In 2012 he joined Piratas de La Guaira. On 2018, he signed with Boca Juniors. On 2020, he joined Club Atlético Goes. In 2023, Narvarte signed with Halcones de Ciudad Obregón and with the Abejas de León. The next season he signed with Dorados de Chihuahua. In March 2025 Narvarte was hired by Peñarol of Montevideo.