| Y 4.Im 6/1 | Committee on Immigration and Naturalization (House) |
| Y 4.Im 6/2 | Committee on Immigration (Senate) |
| Y 4.Im 7 | Select Committee on Improper Activities in Labor or Management Field (Senate) |
| Y 4.Im 7/2 | Senate Impeachment Trial Committee |
| Y 4.In 2/1 | Committee on Indian Affairs (House) |
| Y 4.In 2/2 | Committee on Indian Affairs (Senate) |
| Y 4.In 2/3 | Joint Special Committee on Indian Bureau |
| Y 4.In 2/4 | Committee on Indian Depredations (Senate) |
| Y 4.In 2/5 | Select Committee on Affairs in the Indian Territory (Senate) |
| Y 4.In 2/6 | Joint Special Committee on the Conditions of the Indian Tribes |
| Y 4.In 2/7 | Committee on Industrial Arts and Expositions (House) |
| Y 4.In 2/8 | Committee on Industrial Expositions (Senate) |
| Y 4.In 2/9 | Committee on Indian Service Investigation |
| Y 4.In 2/10 | American Indian Policy Review Commission |
| Y 4.In 2/11 | Committee on Indian Affairs (Senate) |
| Y 4.In 3 | Information and Facilities Commission (House) |
| Y 4.In 7/1 | Committee on Insular Affairs (House) |
| Y 4.In 7/2 | Joint Select Committee to Inquire into Affairs in the Insurrectionary States |
| Y 4.In 8/1 | Committee on Interoceanic Canal (Senate) |
| Y 4.In 8/2 | Select Committee on Internal Revenue Frauds (House) |
| Y 4.In 8/3 | Committee on Interstate and Foreign Commerce (Senate) |
| Y 4.In 8/4 | Committee on Interstate and Foreign Commerce (House) |
| Y 4.In 8/5 | Committee on Invalid Pensions (House) |
| Y 4.In 8/6 | Committee on Investigation and Entrenchment (Senate) |
| Y 4.In 8/7 | Select Committee on Internal Improvements (House) |
| Y 4.In 8/8 | Joint Committee to Investigate the Interior Department and Forestry Service |
| Y 4.In 8/9 | Joint Subcommittee on Interstate Commerce |
| Y 4.In 8/10 | Select Committee on the Investigation of the Internal Revenue Bureau (Senate) |
| Y 4.In 8/11 | Joint Committee on Internal Revenue Taxation |
| Y 4.In 8/12 | Select Committee to Investigate the Interstate Migration of Destitute Citizens (House) |
| Y 4.In 8/13 | Committee on Interior and Insular Affairs (Senate) |
| Y 4.In 8/14 | Committee on Interior and Insular Affairs (House) |
| Y 4.In 8/15 | Committee on Internal Security (House) |
| Y 4.In 8/16 | Committee on Foreign Affairs (House) |
| Y 4.In 8/17 | Select Committee to Study Government Operations with Respect to Intelligence Activities (Senate) |
| Y 4.In 8/18 | Permanent Select Committee on Intelligence (House) |
| Y 4.In 8/19 | Select Committee on Intelligence (Senate) |
| Y 4.In 8/20 | Select Committee to Investigate Covert Arms Transactions with Iran |
| Y 4.Ir 7/1 | Committee on Irrigation and Reclamation (Senate) |
| Y 4.Ir 7/2 | Committee on Irrigation and Reclamation (House) |
