The finals and the qualifying heats of the Women's 100 metres Breaststroke event at the 1998 European Short Course Swimming Championships were held on the first day of the competition, on Friday 11 December 1998 in Sheffield, England.
Finals
edit| RANK | FINAL | TIME |
|---|---|---|
|
 Brigitte Becue (BEL)
|
1:07.71 |
 Alicja Pęczak (POL)
| ||
|
 Svitlana Bondarenko (UKR)
|
1:07.86 |
| 4. |  Nataša Kejžar (SLO)
|
1:08.61 |
| 5. |  Sylvia Gerasch (GER)
|
1:08.85 |
| 6. |  Madelon Baans (NED)
|
1:09.35 |
| 7. |  Olga Moltchanova (RUS)
|
1:09.42 |
 Vera Lischka (AUT)
|
Qualifying Heats
edit| RANK | HEATS RANKING | TIME |
|---|---|---|
| 1. | Alicja Pęczak (POL)
|
1:08.79 |
| 2. | Nataša Kejžar (SLO)
|
1:08.87 |
| 3. | Olga Moltchanova (RUS)
|
1:09.04 |
| 4. | Svitlana Bondarenko (UKR)
|
1:09.18 |
| 5. | Madelon Baans (NED)
|
1:09.25 |
| 6. | Sylvia Gerasch (GER)
|
1:09.46 |
| 7. | Brigitte Becue (BEL)
|
1:09.49 |
| 8. | Vera Lischka (AUT)
|
1:09.52 |
| 9. |  Jaime King (GBR)
|
1:09.79 |
| 10. | Anne Poleska (GER)
|
1:09.94 |
| 11. |  Petra Dufková (CZE)
|
1:10.42 |
| 12. |  Maria Östling (SWE)
|
1:10.63 |
| 13. | Nienke Valen (NED)
|
1:10.70 |
| 14. | Joanne Mullins (GBR)
|
1:11.49 |
| 15. | Martyna Krawczyk (POL)
|
1:11.57 |
| 16. | Elvira Fischer (AUT)
|
1:11.89 |
| 17. |  Smiljana Marinović (CRO)
|
1:11.93 |
| 18. |  Natalia Kodajová (SVK)
|
1:12.68 |
| 19. |  Emma Robinson (IRL)
|
1:12.71 |
| 20. |  Julie Marchesin (FRA)
|
1:13.38 |
| 21. |  Halldora Borgeirsd (ISL)
|
1:14.22 |
| 22. |  Mariona Costa (ESP)
|
1:14.70 |