Thomas Ryder (1735–1790) was a British actor and theatre manager, associated with the Smock Alley Theatre in Dublin. As a player, he was considered at his best in low comedy.
The son of the actor-manager Preswick Ryder (d. 1771) and his actress wife Sarah, he was perhaps born in Nottinghamshire. He had early stage experience in Scotland, at least.
Ryder appeared on 7 December 1757 at Smock Alley Theatre, Dublin, then under the management of Thomas Sheridan, playing Captain Plume in The Recruiting Officer to the Captain Brazen of Samuel Foote. He came to immediate favour. After the failure of Sheridan, Ryder remained under his successor, Brown, supporting Frances Abington as Sir Harry in High Life below Stairs (James Townley) and in other parts. Under Henry Mossop, he played at the same house
For five years Ryder then ran a company, working his way around Ireland. He reopened at Smock Alley Theatre as Sir John Restless in All in the Wrong (Arthur Murphy), and temporarily brought back prosperity to the management. During the slack season Ryder performed at Ranelagh Gardens (Dublin).
In the autumn of 1772, Mossop having retired ruined, Ryder stepped into the management of Smock Alley Theatre, and opened in September with She would and she would not, in which he played for the first time Trappanti. He was then declared to be the most general actor living for tragedy, comedy, opera, and farce.
Ryder remained in management in Dublin, helped by a lottery prize in the early days, with varying but diminishing success, until 1782. When the Fishamble Street Theatre started to take his business, he had the words of The Duenna taken down in shorthand, producing it as The Governess. A legal action ensued, but failed. He kept a carriage, and a country house known as "Ryder's Folly" which he sold unfinished. He also started as printer, editing plays in which he appeared, printing them and publishing a tri-weekly theatrical paper.
After trying in vain to manage Crow Street Theatre as well Smock Alley, Ryder yielded up Crow Street to Richard Daly, resigning management in 1782, and becoming a member of Daly's company.