Question

which prison is located on an island in san francisco bay? *

Explanation:

The prison located on an island in San Francisco Bay is Alcatraz Federal Penitentiary, also known simply as Alcatraz. It was a maximum - security federal prison that operated from 1934 to 1963 and is now a famous tourist attraction and historical site.

Answer:

Alcatraz Federal Penitentiary (Alcatraz)