The 47th Illinois General Assembly met from 1911 to 1913.

John G. Oglesby of Decatur was the Lieutenant Governor of Illinois and thus ex officio President of the Senate.

[a] Henry M. Dunlap was President pro tempore of the Senate.

Charles A. Adkins of Bement was the Speaker of the House of Representatives.

Illinois was divided into 51 districts, each of which elected one Senator and three Representatives.