| March 3, 1859 11 Stat. 437 | Congress organized Oregon as one judicial district with one judgeship. The district court of Oregon, not being assigned to a judicial circuit, was granted the same jurisdiction as U.S. circuit courts, except in appeals and writs of error, which were the jurisdiction of the Supreme Court. |
| March 3, 1863 12 Stat. 794 | This act repealed the circuit court jurisdiction of the Oregon district court, established a U.S. circuit court in the district, and assigned the District of Oregon to the Tenth Circuit. |
| July 23, 1866 14 Stat. 209 | Congress assigned the District of Oregon to the Ninth Circuit. |
| March 2, 1909 35 Stat. 686 | One additional judgeship authorized. |
| August 3, 1949 63 Stat. 493 | One additional judgeship authorized. |
| October 20, 1978 92 Stat. 1629 | Two additional judgeships authorized. |
| December 1, 1990 104 Stat. 5089 | One additional judgeship authorized. |
Authorized Judgeships
1859 | 1 |
1909 | 2 |
1949 | 3 |
1978 | 5 |
1990 | 6 |