|Political party||Sinn Féin|
Ellis was born in Dublin in 1953 and educated there. He later worked as a television repairman. He is a former Provisional IRA prisoner; he was arrested in 1981 and charged with possession of explosives. He jumped bail but was arrested in Buffalo, New York in February 1982 and extradited to the Republic of Ireland where in April 1983 he was sentenced to ten years' imprisonment in Portlaoise Prison. On 14 November 1990, after thirty-five days on hunger-strike, Ellis became the first person extradited from the Republic of Ireland to the United Kingdom under the 1987 Extradition Act. He went on hunger strike in protest at efforts to send him to Britain but was extradited in the sixth week of his fast. Ellis had been convicted of possessing multiple power-timer units for IRA bombs, including those suspected of being used in the Hyde Park and Regent's Park blasts. 
Ellis was first elected to Dublin City Council in 1999 for the Finglas area. He unsuccessfully contested the 2002 general election in the Dublin North-West constituency, and received 4,781 first preference votes (18.3%). He was again unsuccessful at the 2007 general election in the same constituency, receiving 4,873 votes (15.7%).
At the 2011 general election, he was elected to the 31st Dáil with 7,115 (21.7%) of the first-preference votes. At the 2016 general election he was again elected with 7,571 (20.5%) of the first preference votes.
In 2016 a bill was put forward which, if passed would criminalize hare coursing. Sinn Fein supports the legalisation of hare coursing and decided to apply the whip. As Ellis opposes it he declined to vote. He defied party instructions by not informing party whip Aengus O'Snodaigh that he would not be taking part in the vote so he could be excused. He was subsequently given a written warning.
- "Mr. Dessie Ellis". Oireachtas Members Database. Retrieved 17 April 2011.
- "IRA Hunger Striker Tests Extradition Act". Los Angeles Times. 14 November 1990.
- IRA man charged with 1982 Hyde Park bombing
- "Dessie Ellis". ElectionsIreland.org. Retrieved 17 April 2011.
- Two Sinn Féin TDs face suspension over hare coursing Bill
- SF TDs issued with 'written warnings'
- INTERVIEW: Sinn Féin Dublin City Councillor Dessie Ellis
|Sinn Féin Teachta Dála for Dublin North-West