# 9th United States Congress

The 9th United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C., from March 4, 1805, to March 4, 1807, during the fifth and sixth years of Thomas Jefferson's presidency. The apportionment of seats in the House of Representatives was based on the 1800 United States census. Both chambers had a Democratic-Republican majority.

## Major events

* March 4, 1805: President Thomas Jefferson begins his second term.
* June 1, 1805: First Barbary War ends.
* November 7, 1805: Lewis and Clark Expedition arrives at the Pacific Ocean.
* September 23, 1806: Lewis and Clark Expedition returns to St. Louis, Missouri, thereby ending the exploration of the Louisiana Territory and the Pacific Northwest.
* February 19, 1807: Former Vice President Aaron Burr is tried for conspiracy and acquitted.

## Major legislation

* March 29, 1806: Cumberland Road, ch. 19, 2 Stat. 357
* February 24, 1807: Seventh Circuit Act of 1807, ch. 16, (2 Stat. 420)
* March 2, 1807: Act Prohibiting Importation of Slaves, ch. 22, 2 Stat. 426
* March 3, 1807: Insurrection Act, ch. 39, 2 Stat. 443

## Territories organized

* June 30, 1805: Michigan Territory was formed from a portion of the Indiana Territory

## Party summary

The count below identifies party affiliations at the beginning of the first session of this Congress. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section.

### Senate

| | Party (shading shows control) | Party (shading shows control) | Total | Vacant |
| | Democratic- Republican (DR) | Federalist (F) | Total | Vacant |
| End of previous congress | 25 | 9 | 34 | 0 |
| Begin | 26 | 7 | 33 | 1 |
| End | 26 | 7 | 33 | 1 |
| Final voting share | 78.8% | 21.2% | | |
| Beginning of next congress | 28 | 6 | 34 | 0 |

### House of Representatives

| | Party (shading shows control) | Party (shading shows control) | Total | Vacant |
| | Democratic- Republican (DR) | Federalist (F) | Total | Vacant |
| End of previous congress | 102 | 39 | 141 | 1 |
| Begin | 113 | 26 | 139 | 3 |
| End | 112 | 28 | 140 | 2 |
| Final voting share | 80.0% | 20.0% | | |
| Beginning of next congress | 115 | 25 | 140 | 2 |

## Leadership
### Senate

* President: George Clinton (DR)
* President pro tempore: Samuel Smith (DR)

### House of Representatives

* Speaker: Nathaniel Macon (DR)

## Members

This list is arranged by chamber, then by state. Senators are listed by class, and representatives are listed by district.
    Skip to House of Representatives, below

### Senate

Senators were elected by the state legislatures every two years, with one-third beginning new six-year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election.

### House of Representatives

The names of members of the House of Representatives are listed by their district numbers

## Changes in membership

The count below reflects changes from the beginning of this Congress.

### House of Representatives
## Committees

Lists of committees and their party leaders.

### Senate

* Army Regulations (Select)
* Whole

### House of Representatives

* Accounts (Chairman: Frederick Conrad)
* Claims (Chairman: John Cotton Smith then David Holmes)
* Commerce and Manufactures (Chairman: Jacob Crowninshield)
* Elections (Chairman: William Findley)
* Public Lands (Chairman: Andrew Gregg then John Boyle then Andrew Gregg)
* Revisal and Unfinished Business (Chairman: Samuel Tenney)
* Rules (Select)
* Standards of Official Conduct
* Ways and Means (Chairman: John Randolph then Joseph Clay)
* Whole

### Joint committees

* Enrolled Bills (Chairman: N/A then Sen. James Turner)
* The Library (Chairman: N/A)

## Employees
### Legislative branch agency directors

* Architect of the Capitol: Benjamin Latrobe
* Librarian of Congress: John J. Beckley

### Senate

* Chaplain: Alexander T. McCormick, Episcopalian, elected November 7, 1804
** Edward Gantt, Episcopalian, elected December 4, 1805
** John J. Sayrs, Episcopalian, elected December 3, 1806
* Secretary: Samuel A. Otis
* Sergeant at Arms: James Mathers

### House of Representatives

* Chaplain: James Laurie, Presbyterian, elected December 2, 1805
** Robert Elliot, Presbyterian, elected December 1, 1806
* Clerk: John Beckley
* Doorkeeper: Thomas Claxton
* Reading Clerks: [data missing]
* Sergeant at Arms: Joseph Wheaton