The 72nd New York State Legislature, consisting of the New York State Senate and the New York State Assembly, met from January 2 to April 11, 1849, during the first year of Hamilton Fish's governorship, in Albany.

Under the provisions of the New York Constitution of 1846, 32 Senators were elected in single-seat senatorial districts for a two-year term, the whole Senate being renewed biennially. The senatorial districts (except those in New York City) were made up of entire counties. 128 Assemblymen were elected in single-seat districts to a one-year term, the whole Assembly being renewed annually. The Assembly districts were made up of entire towns, or city wards, forming a contiguous area, all in the same county. The City and County of New York was divided into four senatorial districts, and 16 Assembly districts.

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

At this time there were two major political parties: the Democratic Party and the Whig Party. The Democratic Party was split into two factions: the "Barnburners" and the "Hunkers." The Barnburners walked out of the 1848 Democratic state convention and formed with a small faction of anti-slavery Whigs and a part of the Liberty Party the Free Soil Party. The uncompromising radical abolitionists ran their own tickets as the Liberty Party.

The New York state election, 1848 was held on November 7.

Whigs Hamilton Fish and George W. Patterson were elected Governor and Lieutenant Governor; and the other two statewide elective offices were also carried by the Whigs.

State Comptroller Millard Fillmore was elected United States Vice President.

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