|Members 32||Party control Republican (27-5)|
|Jurisdiction New York, United States|
Term January 1 – December 31, 1866
President Lt. Gov. Thomas G. Alvord (R)
Temporary President Charles J. Folger (R), from February 6
The 89th New York State Legislature, consisting of the New York State Senate and the New York State Assembly, met from January 2 to April 20, 1866, during the second year of Reuben E. Fenton's governorship, in Albany.
Under the provisions of the New York Constitution of 1846, 32 Senators and 128 assemblymen were elected in single-seat districts; senators for a two-year term, assemblymen for a one-year term. The senatorial districts were made up of entire counties, except New York County (four districts) and Kings County (two districts). The Assembly districts were made up of entire towns, or city wards, forming a contiguous area, all within the same county.
At this time there were two major political parties: the Republican Party and the Democratic Party.
The New York state election, 1865 was held on November 7. All ten statewide elective offices up for election were carried by the Republicans. The approximate party strength at this election, as expressed by the vote for Secretary of State, was: Republicans 301,000 and Democrats 273,000.
The Legislature met for the regular session at the Old State Capitol in Albany on January 2, 1866; and adjourned on April 20.
Lyman Tremain (R) was elected Speaker with 88 votes against 33 for Smith M. Weed (D).
On January 29, DeWitt C. Littlejohn (R) was elected Speaker pro tempore of the Assembly.
On February 6, Charles J. Folger (R) was re-elected President pro tempore of the State Senate.
On February 16, the Legislature elected Benjamin F. Manierre (R) to succeed William McMurray (D) on March 1 as a Metropolitan Police Commissioner.
On April 16, the Legislature re-apportioned the Assembly seats per county. Allegany, Chenango, Herkimer, Jefferson, Livingston, Steuben and Suffolk counties lost one seat each; Erie County gained one seat, Kings County gained two seats; and New York County gained four seats.
On April 25, the Legislature re-apportioned the Senate districts.
The State Senate met for a special session on June 12; adjourned on June 15; met again on August 28; and adjourned again on August 31. This session was called to hold the trial of George W. Smith, Judge of the Oneida County Court. The trial continued during the next session, and Smith was removed from office on January 25, 1867.
The asterisk (*) denotes members of the previous Legislature who continued in office as members of this Legislature. Charles Stanford changed from the Assembly to the Senate.
The asterisk (*) denotes members of the previous Legislature who continued as members of this Legislature.
Party affiliations follow the vote for Speaker and Police Commissioner.