30th United States Congress

The apportionment of seats in the House of Representatives was based on the 1840 United States census.

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

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

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

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

Sutter's Mill , origin of the California Gold Rush
Mapa de los Estados Unidos de Méjico by John Distrunell : the 1847 map used during negotiations of the Treaty of Guadalupe Hidalgo .
President of the Senate
George M. Dallas
Senators' party membership by state at the opening of the 30th Congress in March 1847. The green stripes in New Hampshire represent independent Democrat John P. Hale. The senators from Iowa and Wisconsin were not seated until later in the Congress.
2 Democrats
1 Democrat and 1 Whig
2 Whigs
Senate President pro tempore
David R. Atchison
Speaker of the House
Robert C. Winthrop
House seats by party holding plurality in state
80+ to 100% Democratic
Up to 60% Whig
60+ to 80% Democratic
60+ to 80% Whig
Up to 60% Democratic
80+ to 100% Whig
Middle aged clean shaven Lincoln from the hips up.
Lincoln in his late 30s as a member of the United States House of Representatives