The 135th New York State Legislature, consisting of the New York State Senate and the New York State Assembly, met from January 3 to March 29, 1912, during the second year of John Alden Dix's governorship, in Albany.

Under the provisions of the New York Constitution of 1894, re-apportioned in 1906 and 1907, 51 Senators and 150 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 (twelve districts), Kings County (eight districts), Erie County (three districts) and Monroe County (two districts). The Assembly districts were made up of 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, 1911, was held on November 7. No statewide elective offices were up for election. For the first time, a Socialist was elected to the Assembly.

The Legislature met for the regular session at the State Capitol in Albany on January 3, 1912; and adjourned on March 29.

Edwin A. Merritt, Jr. (R) was elected Speaker with 95 votes against 45 for Al Smith (D).

On April 19, Bronx County was created by the Legislature, to be effectively separated from New York County on January 1, 1914. To date, this was the last county created in the State of New York.

The asterisk (*) denotes members of the previous Legislature who continued in office as members of this Legislature.

Note: For brevity, the chairmanships omit the words "...the Committee on (the)..."

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