This year's filing deadline for candidates running for the U.S. House of Representatives in New Hampshire was June 12, 2026.

This year ties with 2024 for the highest number of contested primaries since 2014. In total, four primaries — two Democratic and two Republican — are contested this year. In total, there were four contested primaries in 2024, two in 2022, three in 2020, three in 2018, two in 2016, and two in 2014.

Among the candidates running in a contested primary is Rep. Maggie Goodlander (D-2nd). Goodlander is the only incumbent running in a contested primary this year. There was one incumbent in a contested primary in 2024, none in 2022, one in 2020, none in 2018, one in 2016, and none in 2014.

The state's other incumbent, Rep. Chris Pappas (D-1st), is retiring to run for the U.S. Senate in New Hampshire. As a result, one district is open this year. There was one open district in 2024, none in 2022, none in 2020, one in 2018, none in 2016, and none in 2014.

The open 1st Congressional District has attracted the most candidates. Fourteen candidates — nine Democrats and five Republicans — are running for the district.

Twenty candidates — 11 Democrats and nine Republicans — are running for New Hampshire's two congressional districts. That's 10 candidates per district. There were 12 candidates per district in 2024, 9.5 in 2022, six in 2020, 12.5 in 2018, seven in 2016, and five in 2014.

Candidates filed to run in the Republican and Democratic primaries in both districts, meaning neither district is guaranteed to either party.

New Hampshire is holding U.S. House primaries on Sept. 8, 2026.

In New Hampshire, the winner of a primary election is the candidate who receives the greatest number of votes, even if the candidate does not receive 50% of the vote.