Capel Street Theatre was an 18th-century theatre located on Capel Street in Dublin, Ireland.

The Capel Street Theatre had two distinct periods in its history. The first theatre on the site was called the 'New Theatre in Capel Street' or 'City Theatre in Capel Street' and was built by William 'Harlequin' Phillips on a strip of land 50 feet by 100 feet that he leased on the West side of Capel Street