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Federal Judicial Circuits: Ninth Circuit
| March 3, 1837 5 Stat. 177 |
Congress established the Ninth Circuit, including Alabama, Arkansas, Louisiana, and Mississippi (none of which had been included in a circuit) in the circuit. | Alabama, Arkansas, Louisiana, Mississippi |
| August 16, 1842 5 Stat. 507 |
Congress transferred Alabama and Louisiana to the Fifth Circuit. | Arkansas, Mississippi |
| July 15, 1862 12 Stat. 576 |
Congress included Iowa, Kansas, and Minnesota (none of which had been included in a circuit) and Missouri (which had been in the Eighth Circuit) in the Ninth Circuit, transferring Arkansas to the Sixth Circuit and Mississippi to the Fifth Circuit. | Iowa, Kansas, Minnesota, Missouri |
| February 12, 1863 12 Stat. 648 |
Congress included Wisconsin (which had been in the Eighth Circuit) in the Ninth Circuit. | Iowa, Kansas, Minnesota, Missouri, Wisconsin |
| July 23, 1866 14 Stat. 209 |
Congress included California, Nevada, and Oregon (all of which had been in the Tenth Circuit) in the Ninth Circuit, transferring Iowa, Kansas, Minnesota, and Missouri to the Eighth Circuit and Wisconsin to the Seventh Circuit. | California, Nevada, Oregon |
| February 22, 1889 25 Stat. 676 |
Congress included Montana and Washington (neither of which had been included in a circuit) in the Ninth Circuit, effective upon the admission of the State of Montana, November 8, 1889, and the State of Washington, November 11, 1889. | California, Montana, Nevada, Oregon, Washington |
| July 3, 1890 26 Stat. 217 |
Congress included Idaho (which had not been included in a circuit) in the Ninth Circuit. | California, Idaho, Montana, Nevada, Oregon, Washington |
| May 11, 1891 139 U.S. 707 |
Pursuant to authority vested in it by section 15 of the Evarts Act of 1891, the Supreme Court assigned the Territories of Alaska and Arizona to the Ninth Circuit. While the Court's order allowed the U.S. Court of Appeals for the Ninth Circuit to exercise jurisdiction over the territories, it did not formally change the composition of the Ninth Circuit. | No change |
| April 30, 1900 31 Stat. 158 |
Congress permitted appeals and writs of error from the district court for the Territory of Hawaii to go to the U.S. Court of Appeals for the Ninth Circuit. The statute did not formally change the composition of the Ninth Circuit, however. | No change |
| June 6, 1900 31 Stat. 414 |
Congress permitted some appeals and writs of error from the district court for the Territory of Alaska to go to the U.S. Court of Appeals for the Ninth Circuit. The statute did not formally change the composition of the Ninth Circuit, however. | No change |
| April 15, 1901 181 U.S. 625 |
Pursuant to authority vested in it by section 15 of the Evarts Act of 1891, the Supreme Court assigned the Territory of Hawaii to the Ninth Circuit. While the Court's order allowed the U.S. Court of Appeals for the Ninth Circuit to exercise jurisdiction over the territory, it did not formally change the composition of the Ninth Circuit. | No change |
| June 30, 1906 34 Stat. 815 |
Congress permitted appeals from the U.S. Court for China to go to the U.S. Court of Appeals for the Ninth Circuit. The statute did not formally change the composition of the Ninth Circuit, however. The U.S. Court for China was abolished in 1943. | No change |
| March 3, 1911 36 Stat. 1131 |
Congress included the Territory of Hawaii (which had not been included in a circuit) in the Ninth Circuit. | California, Territory of Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| June 20, 1910 36 Stat. 576 |
Congress included Arizona (which had not been included in a circuit) in the Ninth Circuit, effective upon the admission of the State of Arizona, February 14, 1912. | Arizona, California, Territory of Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| June 25, 1948 62 Stat. 870 |
Congress included the Territory of Alaska (which had not been included in a circuit) in the Ninth Circuit. | Territory of Alaska, Arizona, California, Territory of Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| August 1, 1950 64 Stat. 390 |
Congress allowed some appeals from the district court for the Territory of Guam to go to the U.S. Court of Appeals for the Ninth Circuit. The statute did not formally change the composition of the Ninth Circuit, however. | No change |
| October 31, 1951 65 Stat. 723 |
Congress included the Territory of Guam (which had not been included in a circuit) in the Ninth Circuit. | Territory of Alaska, Arizona, California, Territory of Guam, Territory of Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| July 7, 1958 72 Stat. 349 |
Congress included Alaska (which had been in the Ninth Circuit as a territory) in the Ninth Circuit, effective upon the admission of the State of Alaska, January 3, 1959. | Alaska, Arizona, California, Territory of Guam, Territory of Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| March 18, 1959 73 Stat. 10 |
Congress included Hawaii (which had been in the Ninth Circuit as a territory) in the Ninth Circuit, effective upon the admission of the State of Hawaii, August 21, 1959. | Alaska, Arizona, California, Territory of Guam, Hawaii, Idaho, Montana, Nevada, Oregon, Washington |
| November 8, 1977 91 Stat. 1265 |
Congress included the Territory of the Northern Mariana Islands (which had not been included in a circuit) in the Ninth Circuit. | Alaska, Arizona, California, Territory of Guam, Hawaii, Idaho, Montana, Nevada, Territory of the Northern Mariana Islands, Oregon, Washington |