The Assembly districts were made up of entire towns, or city wards, forming a contiguous area, all in the same county.

State Senator Allen Ayrault resigned on June 2, 1848, leaving a vacancy in the 29th District.

The Legislature met for the regular session at the Old State Capitol in Albany on January 2, 1849; and adjourned on April 11.

On January 31, State Comptroller Millard Fillmore sent a letter to the Legislature, resigning the office, to take effect on February 20.

On February 6, the Legislature elected William H. Seward (W) to succeed John A. Dix (Barnb.)

On April 11, Samuel J. Wilkin was elected president pro tempore of the State Senate.