4th Wisconsin Legislature
← 3rd 5th →
Wisconsin State Capitol, 1855
Overview
Legislative body	Wisconsin Legislature
Meeting place	Wisconsin State Capitol
Term	January 6, 1851 – January 5, 1852
Election	November 5, 1850
Senate
Members	19
Senate President	Samuel Beall
President pro tempore	Duncan Reed
Party control	Democratic
Assembly
Members	66
Assembly Speaker	Frederick W. Horn
Party control	Democratic
Sessions
1st January 8, 1851 – March 17, 1851

The Fourth Wisconsin Legislature convened in regular session from January 8, 1851, to March 17, 1851. Senators representing odd-numbered districts were newly elected for this session and served the first year of a two-year term. Assembly members were elected to a one-year term. Assembly members and odd-numbered senators were elected in the general election on November 5, 1850. Senators representing even-numbered districts were serving the second year of their two-year term, having been elected in the general election held on November 6, 1849.^[1]

• January 20, 1851: The Wisconsin Legislature, in joint session, re-elected Henry Dodge to a six-year term as United States Senator.^[2]
• November 4, 1851: Leonard J. Farwell elected Governor of Wisconsin.

• January 22, 1851: Joint resolution in relation to the Honorable Isaac P. Walker, 1851 Joint Resolution 1
• February 1, 1851: Act to incorporate the Fire Department of the City of Milwaukee, 1851 Act 26
• February 4, 1851: Act providing for the election of a Chief Justice, 1851 Act 39
• February 6, 1851: Act to set apart and incorporate the County of Oconto, 1851 Act 44
• February 11, 1851: Act to set apart and incorporate Door County, 1851 Act 66
• February 15, 1851: Act to set apart and incorporate the County of Waushara, 1851 Act 77
• February 17, 1851: Act to incorporate the County of Waupaca, 1851 Act 78
• February 17, 1851: Act to divide the county of Brown and create the county of Outagamie, 1851 Act 83
• March 10, 1851: Act to prevent the killing of deer in certain months of the year, 1851 Act 171
• March 11, 1851: Act to change the name of the town of "Pike" in Kenosha county to "Somers," 1851 Act 211

• 1st Regular session: January 8, 1851–March 17, 1851

• President of the Senate: Samuel Beall, Lieutenant Governor
• President pro tempore: Duncan Reed

• Speaker of the Assembly: Frederick W. Horn

Members of the Wisconsin Senate for the Fourth Wisconsin Legislature:

Members of the Assembly for the Fourth Wisconsin Legislature:

• Chief Clerk: William Hull
• Sergeant-at-Arms: Enias D. Masters

• Chief Clerk: Alexander T. Gray
• Sergeant-at-Arms: Charles S. Kingsbury