- Post Office and Civil Service Committee, House135
- Post Office and Civil Service Committee, Senate59
- Post Office and Post Roads Committee443
- Post Office and Post Roads Committee, House492
- Post Office and Post Roads Committee, Senate411
- Post-Office Department903
- Post-Office Department and Postal Service, Joint Commission on Business Method of2
- Post-Office Department, Select Committee on Relations of Members with the2
- Post-Office Dept.7
- Post-Office Inspectors Division2
- Post-Office Inspectors and Mail Depredations Division2
- Post-Office Inspectors and Mail Depredations, Division of1
- Post-Office Leases Select Committee, Senate1
- Post-Office and Post-Roads Committee190
- Post-Office and Post-Roads Committee (House)19
- Post-Office and Post-Roads Committee (Senate)4
- Post-Office and Post-Roads, Committee on the18
- Post-Offices and Post-Roads Committee (Senate)2
- Post-Offices and Post-Roads, Committee on6
- Post-Offices and Post-Roads, Committee on the2