Papal election, 1277 Cardinal electors Cardinal electors

| Elector | Nationality | Faction | Order_and_Title | Elevated | Elevator |
|---|---|---|---|---|---|
| Bertrand de Saint-Martin | French | neutral | Cardinal-bishop of Sabina | 1273, June 3 | Gregory X |
| Anchero Pantaleone | French | Angevin | Cardinal-priest of S. Prassede | 1262, May 22 | Urban IV |
| Guillaume de Bray | French | Angevin | Cardinal-priest of S. Marco | 1262, May 22 | Urban IV |
| Giovanni Gaetano Orsini | Roman | Roman | Cardinal-deacon of S. Nicola in Carcere Tulliano | 1244, May 28 | Innocent IV |
| Giacomo Savelli | Roman | Roman | Cardinal-deacon of S. Maria in Cosmedin | 1261, December 17 | Urban IV |
| Goffredo da Alatri | Italian | Angevin | Cardinal-deacon of S. Giorgio in Velabro | 1261, December 17 | Urban IV |
| Matteo Orsini Rosso | Roman | Roman | Cardinal-deacon of S. Maria in Portico | 1262, May 22 | Urban IV |