Nebraska's 2nd congressional district is a congressional district in the U.S. state of Nebraska that encompasses the core of the Omaha–Council Bluffs metropolitan area. It includes all of Douglas County, which includes the state's largest city Omaha; it also includes Saunders County and areas of Western Sarpy County. It has been represented in the United States House of Representatives since 2017 by Don Bacon, a member of the Republican Party. It was one of 18 districts that would have voted for Joe Biden in the 2020 presidential election had they existed in their current configuration while being won or held by a Republican in 2022.

With a Cook Partisan Voting Index (CPVI) rating of EVEN, the district is the least Republican of the congressional districts in Nebraska, a state with an all-Republican congressional delegation.^[2] It is also one of seven districts in the country with a CPVI of EVEN, meaning that, overall, the district is relatively equal in terms of the number of people who vote for Democratic candidates versus Republican candidates.

While the rest of the state's electorate tends to be solidly Republican, the 2nd district is much more closely divided between the Republican and Democratic parties.^[3] In the 2010s, the district became known as a swing district; it was one of two districts with a margin of less than 5% in all elections held after the 2010 census. Since 2000, it has backed the electoral winner of the presidential election with the exception of 2012.

Since 1992, Nebraska is one of only two states in the United States that distributes their electoral votes for president by both congressional district and statewide popular vote (the other being Maine). In the 2008 United States presidential election, Democratic presidential candidate Barack Obama targeted the district as a strategy of breaking a potential electoral-vote tie.^[4] He won the district's electoral vote by a margin of 3,325 votes over Republican John McCain, who won the state's other four electoral votes.^[5] Obama's victory in the 2nd district meant that Nebraska's electoral delegation was split for the first time ever, and the first Nebraskan electoral vote for a Democrat since 1964.^[5] However, he subsequently failed to win the district in 2012 against Mitt Romney.^[6] In 2014, longtime Representative Lee Terry, a Republican, was ousted by Democratic challenger Brad Ashford, one of only two Republican incumbents that cycle to lose their seat.^[7]

In 2016, Republican Donald Trump won only a plurality of the 2nd district over Democrat Hillary Clinton; he won only 2% over Clinton, a sharp reduction of Romney's seven-point advantage over Obama. In 2020, Trump notably targeted the district in a fashion similar to Obama as Democrat Joe Biden polled at an advantage in the district.^[8] Trump's campaigning in the district drew criticism after rally attendees were left stranded in freezing temperatures due to transportation issues.^[9] Biden ultimately won in the district over Trump by six points, nearly matching Romney's margin over Obama.^[10] Precious McKesson cast the electoral vote, making her the first woman of color in the state to cast an Electoral college ballot.^[11][12]

• Nebraska's congressional districts
• Maine's 2nd congressional district
• List of United States congressional districts