[1] It is located west of Point San Quentin,[2] at an elevation of 30 feet (9.1 meters).

Before California's effective moratorium on the death penalty in 2006, San Quentin was the only place in the state where prisoners were executed.

[7] The United States Postal Service operates the San Quentin Post Office.

Federally, San Quentin is in California's 2nd congressional district, represented by Democrat Jared Huffman.

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