15th Wisconsin Legislature

• January 6, 1862: Inauguration of Louis P. Harvey as the 7th Governor of Wisconsin.
• January 10, 1862: Assemblymember Alexander Campbell of Iowa County resigned his seat after it was demonstrated that he had actually lost his election to Robert Wilson.
• January 16, 1862: Joseph M. Morrow sworn in to replace the deceased Simon D. Powers as assemblymember for the Monroe County district
• April 6–7, 1862: Battle of Shiloh took place in Hardin County, Tennessee. Three regiments of Wisconsin Volunteers participated in the battle. Former Wisconsin state senator James S. Alban was killed, and former state senator Benjamin Allen was wounded.
• April 19, 1862: Wisconsin Governor Louis P. Harvey died in an accident near Savannah, Tennessee. Lieutenant Governor Edward Salomon became the 8th Governor of Wisconsin.
• May 1, 1862: Union forces occupied New Orleans after Confederate forces evacuated the city.
• May 8, 1862: State senator Charles Quentin died.
• September 1, 1862: Dr. Francis Huebschmann was sworn in to replace the deceased Charles Quentin as senator for the 5th district.
• September 17, 1862: Battle of Antietam took place near Sharpsburg, Maryland. Five regiments of Wisconsin Volunteers participated in the battle.
• September 22, 1862: U.S. President Abraham Lincoln issued the Emancipation Proclamation.
• October 8, 1862: Battle of Perryville took place near Perryville, Kentucky.

• February 17, 1862: Joint Resolutions relative to amending the constitution in regard to the governor's salary, 1862 Joint Resolution 6. Proposed an amendment to the Constitution of Wisconsin to increase the salary of the governor from $1,250 to $2,500 per year. The amendment was rejected by voters in the November general election.
• March 22, 1862: Act to change the name of Bad Ax County to that of Vernon, 1862 Act 137

• September 25, 1862: Act to empower towns, cities, incorporated villages and counties to raise money for the payment of bounties to volunteers, 1862 Special Session Act 13

• 1st Regular session: January 8, 1862 – April 7, 1862; June 3, 1862 – June 17, 1862
• Special session: September 10, 1862 – September 26, 1862

• President of the Senate: Edward Salomon, Lieutenant Governor (until April 19, 1862)
• President pro tempore: Frederick O. Thorpe (until September 10, 1862)
  • Gerry Whiting Hazelton (from September 10, 1862)

• Speaker of the Assembly: Joseph W. Beardsley

Members of the Wisconsin Senate for the Fifteenth Wisconsin Legislature:^[2]

Members of the Assembly for the Fifteenth Wisconsin Legislature:^[3]

• Chief Clerk: John H. Warren^[2]
  • Assistant Clerk: Erasmus D. Campbell
  • Engrossing Clerk: T. Wilson Caster
  • Enrolling Clerk: J. M. Randall
  • Transcribing Clerk: F. W. Stewart
• Sergeant-at-Arms: Bloom U. Caswell
  • Assistant Sergeant-at-Arms: James L. Wilder
• Postmaster: H. W. Browne
  • Assistant Postmaster: D. H. Pulcifer
• Doorkeeper: William C. Lesure
  • Assistant Doorkeeper: Julius C. Chandler
• Firemen:
  • C. H. Beyler
  • John Crowley
• Messengers:
  • Fred Sholes
  • Albert F. Dexter
  • William L. Abbott

• Chief Clerk: John S. Dean^[3]
  • Assistant Clerk: Ephraim W. Young
    • Bookkeeper: Sylvester Foord, Jr.
  • Engrossing Clerk: Herbert A. Lewis
  • Enrolling Clerk: Daniel Brisbois
  • Transcribing Clerk: Henry F. Pelton
• Sergeant-at-Arms: A. A. Huntingdon
  • Assistant Sergeant-at-Arms: Jas. G. Alden
  • 2nd Assistant Sergeant-at-Arms: J. W. Overbaugh
• Postmaster: A. A. Bennett
  • Assistant Postmaster: N. F. Pierce
  • 2nd Assistant Postmaster: William P. Bowman
• Doorkeeper: J. I. Ellis
  • Assistant Doorkeeper: Frederik Huchting
  • Assistant Doorkeeper: E. T. Kearney
• Firemen:
  • Reese Evans
  • E. C. Cavenaugh
  • Barnet Wilson
• Messengers:
  • E. C. Mason
  • Jno. N. Ford
  • E. D. Strong
  • Albert W. Carpenter
  • Fred. VanBergen
  • William Booth
  • Samuel Myers
  • Hugh Spencer
  • Rufus H. Roys
  • George D. Potter
  • Linus S. Webb

New districts for the 15th Legislature were defined in 1861 Wisconsin Act 216, passed into law in the 14th Wisconsin Legislature.

• 17 senate districts were left unchanged.
• The Dane County district boundaries were slightly redrawn (11, 26).
• Dodge County went from having one senator to two (18, 33).
• Jefferson County went from two senators to one (23).
• Rock County went from two senators to one (17).
• Sauk County became its own senate district (14), after previously having been in a shared district with Adams and Juneau counties.
• Iowa County became its own senate district (15), after previously having been in a shared district with Richland county.
• Waushara County was moved from the 27th district to the 9th.
• The multi-county northeastern district was divided into two (2, 22).
• The multi-county western region of the state went from two senators to four (28, 30, 31, 32).

• Adams and Juneau counties became separate assembly districts, after previously having been in a shared district.
• Bad Ax County became 2 assembly districts, after previously having been in a shared district with Crawford County.
• Dane County went from having 6 districts to 5.
• Dodge County went from having 6 districts to 5.
• Jefferson County went from having 5 districts to 4.
• Kenosha County went from having 2 districts to 1.
• Kewaunee County became its own assembly district, after previously having been in a shared district with Door, Oconto, and Shawano counties.
• La Crosse and Monroe counties became separate assembly districts, after previously having been in a shared district.
• Lafayette County went from having 3 districts to 2.
• Manitowoc County went from having 2 districts to 3.
• Marquette County went from having 2 districts to 1.
• Ozaukee County went from having 2 districts to 1.
• Portage County became its own assembly district, after previously having been in a shared district with Marathon and Wood counties.
• Racine County went from having 4 districts to 3.
• Rock County went from having 5 districts to 6.
• Sheboygan County went from having 3 districts to 4.