| 1998 Waterford Senior Hurling Championship | |
| Sponsor: | Tedcastle Oils |
| Champions: | Mount Sion |
| Count: | 30 |
| Champions Captain: | Roy McGrath |
| Champions Manager: | John Meaney |
| Runners-Up: | Ballyduff Upper |
| Runners-Up Captain: | Paudie Prendergast |
| Runners-Up Manager: | Liam Power |
| Previous Year: | 1997 |
| Previous Tournament: | 1997 Waterford Senior Hurling Championship |
| Next Year: | 1999 |
| Next Tournament: | 1999 Waterford Senior Hurling Championship |
The 1998 Waterford Senior Hurling Championship was the 98th staging of the Waterford Senior Hurling Championship since its establishment by the Waterford County Board in 1897.
Ballygunner were the defending champions.
On 11 October 1998, Mount Sion won the championship after a 3–19 to 0–10 defeat of Ballyduff Upper in the final.[1] This was their 30th championship title overall and their first title since 1994.