17 U.S. Representatives had been elected in April 1802 to a term in the 8th United States Congress beginning on March 4, 1803. John Cantine had resigned his seat, and Isaac Bloom had died in April 1803. Josiah Hasbrouck and Daniel C. Verplanck were elected to fill the vacancies. In February 1804, John Smith was elected to the U.S. Senate, leaving a vacancy in the 1st District. The other 16 representatives' term would end on March 3, 1805. The congressional elections were held together with the State elections in late April 1804, about ten months before the term would start on March 4, 1805, and about a year and a half before Congress actually met on December 2, 1805.
Congressional districts
After the U.S. census of 1800, New York's representation in the House was increased to 17 seats. On March 30, 1802, the New York State Legislature had re-apportioned the congressional districts, dividing New York County seemingly at random into two districts. After the election of one Democratic-Republican and one Federalist in 1802, the Dem.-Rep. majority in the State Legislature gerrymandered the two districts together in an Act passed on March 20, 1804, so that two congressmen would be elected on a general ticket by the voters of both districts, assuring the election of two Democratic-Republicans. Besides, Seneca Co. was split from Cayuga Co. inside the 17th District.
The 17th District comprising Ontario, Steuben, Cayuga and Seneca counties.
Note: There are now 62 counties in the State of New York. The counties which are not mentioned in this list had not yet been established, or sufficiently organized, the area being included in one or more of the abovementioned counties.
Result
15 Democratic-Republicans and 2 Federalists were elected to the 9th Congress, and one Democratic-Reopublican to fill the vacancy in the 8th Congress. The incumbents Mitchill, Van Cortlandt, Verplanck, Livingston, Van Rensselaer, Thomas and Sammons were re-elected; the incumbent Root was defeated. Note: The Anti-Federalists called themselves "Republicans." However, at the same time, the Federalists called them "Democrats" which was meant to be pejorative. After some time both terms got more and more confused, and sometimes used together as "Democratic Republicans" which later historians have adopted to describe the party from the beginning, to avoid confusion with both the later established and still existing Democratic and Republican parties.
Aftermath and special elections
, elected in the 2nd/3rd D., was appointed on July 2, 1804, to the New York Supreme Court and resigned his seat, before the congressional term began. A special election to fill the vacancy was held in October 1804, and was won by Gurdon S. Mumford, of the same party. Samuel L. Mitchill, who had been re-elected in the 2nd/3rd D. to a third term, resigned his seat on November 22, 1804, after his election to the U.S. Senate. A special election to fill both vacancies was held, and was won by George Clinton, Jr., of the same party. Clinton took his seat in the 8th Congress on February 14, 1805, and remained in office after March 4 in the 9th Congress.