Joseph McKenna (August 10, 1843–November 21, 1926) was an American politician who served in all three branches of the U.S. federal government, as a member of the U.S. House of Representatives, as U.S. Attorney General and as an Associate Justice of the Supreme Court.

Born in Philadelphia, Pennsylvania, he attended St. Joseph's College and the Collegiate Institute at Benicia, California. After being admitted to the bar, he became district attorney for Solano County and then served in the California State Assembly for two years.

McKenna was elected to the United States House of Representatives and served for four terms. He was appointed to the Ninth Circuit Court of Appeals in 1892 by President Benjamin Harrison.

In 1897 he was appointed Attorney General of the United States by President William McKinley, and served in that capacity until 1898. He was then appointed an Associate Justice of the Supreme Court of the United States to succeed Justice Stephen J. Field.

McKenna died in 1926 in Washington, D.C.

|- style="text-align: center;" | width="30%" |Preceded by:
Stephen Johnson Field | width="40%" style="text-align: center;" |Associate Justice of the Supreme Court of the United States
January 26, 1898 – January 5, 1925 | width="30%" |Succeeded by:
Harlan Fiske Stone

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