2010 US Senate Elections

The 2010 United States Senate elections were held on November 2, 2010, from among the United States Senate's 100 seats. A special election was held on January 19, 2010, for a mid-term vacancy in Massachusetts. Thirty-four of the November elections were for six-year terms to the Senate's Class 3, while other three were special elections to finish incomplete terms. Those 37 November elections featured 19 incumbent Democrats.

After the 2008 elections, the Senate was composed of 61 Democrats, 40 Republicans. Democrats retained control of the Senate after the election.

Republicans won two seats held by retiring Democrats for a Republican net gain of two seats. This was the first time since 1994 that Republicans successfully defended all of their own seats. This was also the fourth consecutive election of Class 3 senators where Democrats failed to gain seats, and the third consecutive midterm election held in a president's first term where Republicans picked up seats. Despite the Republican gains, the Democrats retained a majority of the Senate with 59 seats, compared to the 41 Republican seats.

New York (special)
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