The eighth Minnesota Territorial Legislature first convened on January 7, 1857. The 15 members of the Minnesota Territorial Council were elected during the General Election of October 9, 1855, and the 38 members of the Minnesota House of Representatives were elected during the General Election of October 14, 1856. The eighth territorial legislature was the final territorial legislature held before the Territory of Minnesota was dissolved and Minnesota was admitted as a state.

The territorial legislature met in a regular session from January 7, 1857 to March 7, 1857. A special session was convened from April 27, 1857 to May 25, 1857 to consider various matters which had not been acted upon during the regular session, including numerous incorporations, as well as to provide for the payment of the expenses of the constitutional convention which convened to draft the Constitution of the State of Minnesota roughly two weeks after the special session adjourned.

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