All 24 seats in the New Hampshire State Senate are up for election on November 5, 2024. Heading into the election, Republicans hold a 14-10 majority.

Control of the New Hampshire State Senate has changed twice between 2012 and 2024. Democrats gained a majority in 2018, followed by Republicans in 2020. Politico listed the New Hampshire Legislature as one of the most likely to switch party control in 2024, writing that “control of the Legislature has switched back and forth between parties over the years, underscoring the opportunity for either party to sell voters on a different vision for policymaking.”

New Hampshire is currently under a Republican trifecta, meaning one party holds the governorship and both state legislative chambers.

The results of these elections could change the state’s trifecta status. The New Hampshire governor’s seat is open for the first time since 2016. As of Oct. 30, 2024, The Cook Political Report with Amy Walter, Inside Elections with Nathan L. Gonzales, and Larry J. Sabato’s Crystal Ball all rated the governor’s race a Toss-Up. Democrats need to win three seats to take control of the Senate and seven to take control of the House. Click here for more information on trifecta vulnerability and how these ratings were determined.

In the 2020 general election, Republicans won a 14-10 majority, gaining four seats and reversing the 14-10 Democratic majority. In the 2022 general election, Republicans maintained that 14-10 majority.

Ballotpedia identified eight battleground elections in this chamber. Democrats represent two of these districts, while Republicans represent six.

The New Hampshire Senate is one of 85 state legislative chambers with elections in 2024. There are 99 chambers throughout the country.