William III, Count of Nevers | |
|---|---|
| Count of Nevers | |
| Reign | 1148 – 1161 |
| Predecessor | William II |
| Successor | William IV |
| Born | c. 1107 |
| Died | 21 November 1161 |
| Spouse(s) | Ida |
| Issue | William IV, Count of Nevers Guy, Count of Nevers Renaud Adelaide Ermengarde |
| Father | William II, Count of Nevers |
| Mother | Adelaide |
William III, Count of Nevers (French: Guillaume III, c. 1107 – 21 November 1161) was Count of Nevers, Auxerre and Tonnerre (1148–1161). He was born in Auxerre.