| Election Name: | 1998 Limerick East by-election |
| Country: | Ireland |
| Type: | presidential |
| Ongoing: | no |
| Previous Year: | 1997 general election |
| Election Date: | 11 March 1998 |
| Next Year: | 2002 general election |
| Turnout: | 42,703 (54.7%) |
| 2Blank: | Percentage |
| 3Blank: | Final count |
| Nominee1: | Jan O'Sullivan |
| Party1: | Labour Party (Ireland) |
| 1Data1: | 10,619 |
| 2Data1: | 24.9 |
| 3Data1: | 22,888 |
| Nominee2: | Sandra Marsh |
| Party2: | Fianna Fáil |
| 1Data2: | 10,173 |
| 2Data2: | 23.8 |
| 3Data2: | 15,188 |
| Nominee3: | Mary Jackman |
| Party3: | Fine Gael |
| 1Data3: | 10,445 |
| 2Data3: | 24.5 |
| 3Data3: | – |
| Nominee4: | Tim O'Malley |
| Party4: | Progressive Democrats |
| 1Data4: | 4,287 |
| 2Data4: | 10.0 |
| 3Data4: | – |
| Nominee5: | John Ryan |
| Party5: | Democratic Left (Ireland) |
| 1Data5: | 3,868 |
| 2Data5: | 9.1 |
| 3Data5: | – |
| Nominee6: | Jenny Marie Shapland |
| Party6: | Sinn Féin |
| 1Data6: | 909 |
| 2Data6: | 2.1 |
| 3Data6: | – |
| Nominee7: | John Gilligan |
| Party7: | Independent (politician) |
| 1Data7: | 850 |
| 2Data7: | 2.0 |
| 3Data7: | – |
| Nominee8: | Nora Bennis |
| Party8: | National Party (Ireland, 1995) |
| 1Data8: | 700 |
| 2Data8: | 1.6 |
| 3Data8: | – |
| Nominee9: | Eric Sheppard |
| Party9: | Green Party (Ireland) |
| 1Data9: | 546 |
| 2Data9: | 1.3 |
| 3Data9: | – |
| TD | |
| Before Election: | Jim Kemmy |
| Before Party: | Labour Party (Ireland) |
| After Election: | Jan O'Sullivan |
| After Party: | Labour Party (Ireland) |
A by-election was held in the Dáil Éireann Limerick East constituency in Ireland on 11 March 1998. It followed the death of Labour Party Teachta Dála (TD) Jim Kemmy on 25 September 1997.
The election was won by Limerick City Councillor Jan O'Sullivan of the Labour Party.
Among the candidates were Senator and Limerick County Councillor Mary Jackman, Limerick County Councillor Tim O'Malley, Limerick City Councillor John Ryan, Limerick City Councillor John Gilligan
On the same day, a by-election took place in Dublin North, both were the final occasions which Democratic Left contested by-elections.