Elections for the Massachusetts House of Representatives will take place in 2026. The general election is on November 3, 2026. The primary is September 1, 2026. The filing deadline was May 26, 2026.

The Massachusetts House of Representatives is one of 88 state legislative chambers with elections in 2026. There are 99 chambers throughout the country.

Contested Democratic primaries are taking place in 31 House districts on September 1, 2026.

In 2024, Massachusetts voters approved Question 1 by a 72%–28% margin. The ballot measure authorized the state Auditor to audit the state legislature's operations. State Auditor Diana DiZoglio (D) sued the legislature in February 2026, saying it had not complied with her efforts to initiate an audit. On June 2, 2026, the state House voted 125-28 to approve a bill limiting the auditor's authority to audit the legislature. Three of 132 Democrats and all 25 Republicans voted against the bill.

MassLive's John L. Micek said the 2026 legislative primaries are taking place "against the backdrop of a general dissatisfaction with incumbents and a pair of ballot questions aimed at cleaning up and shedding some light on Beacon Hill’s notoriously opaque operations."

Ballotpedia identified seven primaries where Democratic challengers to incumbents who voted for the legislative audit bill mentioned transparency in their campaign materials. The primaries are among 27 Ballotpedia identified as battlegrounds. Ballotpedia makes battleground designations for state legislative primaries based on electoral competitiveness and political context. Criteria include open seats, incumbents' prior electoral performance, and the presence of organized or experienced challengers.

Twelve House seats are open, meaning no incumbent filed to run, down from 16 in 2024 and the fewest since 2016. Twenty-two House incumbents (including one Republican) face primary challengers, up from 15 in 2024 and the most since at least 2010.

Democrats have a 132-25-1 supermajority in the Massachusetts House and a 35-5 supermajority in the Massachusetts Senate.