John Thomas Ball QC was an Irish barrister, judge and politician in the Parliament of the United Kingdom of Great Britain and Ireland, and Lord Chancellor of Ireland.

The Solicitor-General for Ireland was the holder of an Irish and then United Kingdom government office. The holder was a deputy to the Attorney-General for Ireland, and advised the Crown on Irish legal matters. On rare occasions, there was also a Deputy Attorney-General, who was distinct from the Solicitor-General. At least two holders of the office, Patrick Barnewall (1534–1550) and Sir Roger Wilbraham (1586–1603), played a leading role in Government, although in Barnewall's case, this may be partly because he, was also King's Serjeant. As with the Solicitor General for England and Wales, the Solicitor-General for Ireland was usually a barrister rather than a solicitor.