1999 Dublin South-Central by-election

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Turnout	20,116 (28.8%)
Nominee Mary Upton Michael Mulcahy Catherine Byrne Party Labour Fianna Fáil Fine Gael First preferences 5,637 6,050 4,037 Percentage 28.0 30.1 20.1 Final count 10,274 7,901 –   Nominee Aengus Ó Snodaigh John Goodwillie Manus MacMeanmain Party Sinn Féin Green Christian Solidarity First preferences 1,686 1,263 399 Percentage 8.4 6.3 2.0 Final count – – –   Nominee Shay Kelly Eammon Murphy John Burns Party Workers' Party Independent Natural Law First preferences 555 383 106 Percentage 2.8 1.9 0.5 Final count – – –
TD before election Pat Upton Labour Elected TD Mary Upton Labour

A by-election was held in the Dáil Éireann Dublin South-Central constituency in Ireland on 27 October 1999. It followed the death of Labour Party Teachta Dála (TD) Pat Upton on 22 February 1999.

The election was won by Mary Upton of the Labour Party and sister of Pat Upton. The other candidates being Dublin City Councillor Michael Mulcahy for Fianna Fáil, Dublin City Councillor Catherine Byrne for Fine Gael, Aengus Ó Snodaigh for Sinn Féin, John Goodwillie for the Green Party, Shay Kelly for the Workers' Party, Manus MacMeanmain for Christian Solidarity, Eammon Murphy as an Independent and John Burns for Natural Law. Mulcahy, Byrne and Ó Snodaigh would all go on to represent the constituency as TDs in the future.

Result