Thirtieth Congress

30th United States Congress
29th ← → 31st
United States Capitol (1846)
March 4, 1847 – March 4, 1849
Senate President	George M. Dallas (D)
Senate Pres. pro tem	David R. Atchison (D)
House Speaker	Robert C. Winthrop (W)
Members	60 Senators 230 Representatives 2 Non-voting members
Senate Majority	Democratic
House Majority	Whig
Sessions
1st: December 6, 1847 – August 14, 1848 2nd: December 4, 1848 – March 3, 1849

The Thirtieth 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, 1847, to March 4, 1849, during the last two years of the administration of President James K. Polk. The apportionment of seats in the House of Representatives was based on the Sixth Census of the United States in 1840. The Senate had a Democratic majority, and the House had a Whig majority. It was the only Congress in which Abraham Lincoln served.

During this congress, two Senate seats was added for the new state of Wisconsin.

During this congress, two House seats were added for the new state of Wisconsin.

This list is arranged by chamber, then by state. Senators are listed in order of seniority, and Representatives are listed by district.

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

(5 Democrats, 2 Whigs)

(1 Democrat)

(4 Whigs)

(1 Whig)

(4 Democrats, 4 Whigs)

(6 Democrats, 1 Whig)

(6 Democrats, 4 Whigs)

(2 Democrats)

(6 Whigs, 4 Democrats)

(3 Democrats, 1 Whig)

(6 Democrats, 1 Whig)

(4 Whigs, 2 Democrats)

(10 Whigs)

(3 Democrats)

(3 Democrats, 1 Whig)

(5 Democrats)

(2 Democrats, 1 Whig, 1 Independent)

(4 Whigs, 1 Democrat)

(23 Whigs, 10 Democrats)

(6 Whigs, 3 Democrats)

(11 Whigs, 10 Democrats)

(15 Whigs, 7 Democrats)

(1 Democrat, 1 Whig)

(7 Democrats)

(6 Democrats, 5 Whigs)

(2 Democrats)

(3 Whigs, 1 Democrats)

(9 Democrats, 6 Whigs)

(2 Democrats)

(1 Whig)

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

Lists of committees and their party leaders.