Gojčin Crnojević (Serbian Cyrillic: Гојчин Црнојевић; his name is also spelled Kojčin (Којчин), in Latin: Goycinus) was a Lord of Zeta, initially as a vassal of the Serbian Despotate until he revolted against Despot Stefan Lazarević. He disappeared from sources in 1451.
Gojčin was the second son of Đurađ Đurašević of the Crnojević noble family. His father and uncle Aleksa were the lords of the territory of Paštrovići (Luštica and hills above Kotor and Budva) during the reign of Balša III. His brothers were Đurašin, Stefanica and another one with an unknown name and historical role. He was mentioned for the first time in 1431. He initially had the title of knez, and later vojvoda. The Crnojevići, initially vassals of the Serbian Despotate, revolted against the Despot.
He held good relations with the Republic of Ragusa. Gojčin was also registered as a citizen of the Republic of Venice in July 1444. He and his two younger brothers defected to Venice after their older brother concluded his alliance with Stjepan Vukčić Kosača.