The boundaries of the Castlegate Quarter are formed by Castlegate and the River Don to the north, Exchange Place to the east, Commercial Street and part of the High Street to the south, and Angel Street and Snig Hill to the west. For the latter part of the 20th century, the Castlegate Quarter was dominated by Castle Market, a large indoor market building.
The Castlegate Quarter is bounded by its northern edge along Castlegate and the River Don, eastern edge at Exchange Place, southern edge at Commercial Street and part of the High Street, and western edge at Angel Street and Snig Hill. The area was largely controlled by Castle Market for most of the 20th century.