| Litigants: | Ex parte Jackson |
| Decidedate: | October 1 |
| Decideyear: | 1878 |
| Fullname: | Ex parte Jackson |
| Usvol: | 96 |
| Uspage: | 727 |
| Parallelcitations: | 6 Otto 727; 24 L. Ed. 877 |
| Majority: | Field |
| Joinmajority: | unanimous |
Ex parte Jackson, 96 U.S. 727 (1878), was a United States Supreme Court ex parte decision.[1] The case decided that the United States Post Office may open and inspect mail to limit the transmission of circulars on lotteries.[2] It also extended Fourth Amendment protections to private letters, holding that letters and sealed packages sent through the mail required warrants to be searched through.