| July 10, 1890 26 Stat. 222 |
Congress organized Wyoming as one judicial district, authorized one judgeship for the U.S. district court, and assigned the district to the Eighth Circuit. |
| February 28, 1929 45 Stat. 1346 |
Congress assigned the District of Wyoming to the newly-organized Tenth Circuit. |
| June 25, 1948 62 Stat. 895 |
Congress transferred the portions of Yellowstone National Park situated in Idaho and Montana to the District of Wyoming. |
| July 10, 1984 98 Stat. 333 |
One additional judgeship authorized. |
| December 1, 1990 104 Stat. 5089 |
One additional judgeship authorized. |