Alcatraz Dining Hall, Prison dining hall in Alcatraz Island, San Francisco, United States.

Alcatraz Dining Hall is a long wing at the west end of the Main Cellhouse, entered from the corridor called "Times Square" beneath a large clock. The room has a low, beamed ceiling carried on thick square concrete columns painted off-white with a pale green band at the base, dark reddish-brown flooring, and tall barred windows along one wall. A stainless-steel serving counter with recessed basins and two ridged cylindrical urns stands at one end, with the kitchen beyond.

This room opened in 1934 when the maximum-security prison began operations and continued serving meals to inmates until the facility closed in 1963. During those decades, the space remained largely unchanged, maintaining its original design and security features throughout the prison's history.

The dining hall was where inmates gathered under guard each day, and the strictly ordered seating and mealtimes shaped daily life on the island. This controlled space reflected how the prison organized every moment of interaction among prisoners.

The hall is not open to visitors on the day tour; it can only be viewed from the "Times Square" corridor, the passage beneath a large clock that links the Main Cellhouse to the dining wing. The kitchen lies beyond the hall. A metal detector once stood outside the entrance.

The gun gallery was not inside the hall: it stood in the Recreation Yard, mounted on one of the dining hall's exterior walls. Inside, tear-gas canisters were fixed to the ceiling rafters and could be fired by remote control if prisoners rioted or tried to escape.