Incumbent Josh Riley (D/Working Families Party) defeated Peter Oberacker (R/Conservative Party) in the general election for New York's 19th Congressional District on November 3, 2026.

Riley defeated then-incumbent Marcus Molinaro (R/Conservative Party) 51.1%–48.8% in 2024. Molinaro defeated Riley 50.8%–49.2% under different district lines in 2022. In 2024, Kamala Harris (D) defeated Donald Trump (R) 50.4%–48.7% in the 19th District. As of November 2026, major election forecasters rated the election Likely Democratic.

Riley was an attorney and former political staffer for U.S. Sen. Al Franken (D-Minn.). His campaign website said he had "helped pass bipartisan legislation to protect survivors of domestic violence and combat the opioid epidemic. He worked on legislation to restore the Voting Rights Act, and he led efforts to overturn Citizens United and end the influence of dark money in politics."

Oberacker was elected to the New York Senate in 2020 and earlier served on the Otsego County Legislature and in the town government of Maryland, New York. He was a retired food scientist who founded FormTech Solutions. Oberacker's campaign website said he "has focused on delivering results, keeping taxes low, and standing up for the people he represents. He has never created a budget that raised taxes."

As of November 2, 2026, Riley had raised $5.99 million, and Oberacker had raised $1.42 million.

The outcome of this race affected the partisan balance of the U.S. House of Representatives in the 120th Congress. All 435 U.S. House districts were up for election.

At the time of the election, Republicans had a 219-214 majority with two vacancies in the U.S. House.