2023–2024 New Hampshire state legislative special elections

In 2023, various special elections were held throughout the year in New Hampshire, mostly to the state's House of Representatives. At 400 members, the state house is the largest state legislative body in the United States, and the fourth largest lower house in the English-speaking world. As members are only paid $100 per year plus travel costs, turnover tends to be frequent, as members resign or die mid-term, resulting in a special election to replace them. According to the Constitution of the State of New Hampshire, if there is a vacancy in the New Hampshire General Court, a special election must be called to fill the vacant seat within 21 days of receiving proof of a vacancy or a request that a vacancy be filled.

In the 2022 State House election, Republicans won 201 seats, Democrats won 198, and one seat resulted in a tie. The closeness of the result attracted additional attention to the special elections, as it raised the probability of a mid-session flip.

The special elections were largely marked by strong overperformances by the New Hampshire Democratic Party. Democrat Chuck Grassie won a special election in February to a seat that had tied the previous November, and Democrat Hal Rafter won a Republican-held seat in September.