Under the provisions of the
New York Constitution of 1894, re-apportioned in 1917, 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. In 1917, the Legislature redistricted the Senate seats, and re-apportioned the number of assemblymen per county.
Bronx County—which had been part of New York County at the time of the previous apportionment and occupied roughly the area of four Assembly districts—was properly separated, and was apportioned eight seats. New York County (without the Bronx) lost eight seats; and Erie, Jefferson and Ulster counties lost one seat each. Queens County gained two seats; and Broome, Nassau, Richmond, Schenectady and Westchester counties gained one seat each. At this time there were two major political parties: the
Republican Party and the
Democratic Party. The
Socialist Party and the
Prohibition Party also nominated tickets. ==Elections==