Polymarket
KalshiThe 5th Is Priced as a Democratic Hold Because Bergen County's Margin Has Not Moved in Two Very Different Elections
The New Jersey 5th District odds rest on Bergen County having already decided the race. Josh Gottheimer, sworn in for a fifth term on January 3, 2025, won on November 5, 2024 by 43,072 votes out of 381,889, and the whole of it came from the Bergen portion, where he led Republican Mary Jo Guinchard 176,817 to 119,958 while the Sussex and Passaic portions both went Republican. The market prices the seat as a Democratic hold because it treats a margin that stayed near eleven points in a midterm and a presidential year alike as the district's settled shape, and the Republican nominee, Sean Kirrane of River Vale, as a candidate running against a county rather than against an incumbent. The live board above carries the current price.
What the 5th District Odds Rest On
The price rests on the steadiness of one number. On November 8, 2022, Gottheimer beat Frank Pallotta 145,559 to 117,873, a 10.4-point margin on 265,943 votes. On November 5, 2024, he beat Guinchard 208,359 to 165,287, 11.3 points on 381,889. The electorate grew by 115,946 votes between the two elections and the margin moved by less than a point. Of the four New Jersey district boards written up here, this is the only seat whose margin widened from the midterm to the presidential year, and the market reads that as a seat whose result does not depend on which electorate turns up.
The county portions show where the steadiness comes from and where it could fail. Bergen supplied a 38,583-vote Democratic margin in 2022 and 56,859 in 2024. Sussex went Republican by 8,178 in 2022 and 9,569 in 2024; Passaic went Republican by 2,719 and then 4,218. Two of the three counties vote the other way and are growing their margins, and the market's answer is that Bergen's two-party vote of 296,775 in 2024 dwarfs Sussex's 46,009 and Passaic's 30,862 combined. The market treats Bergen as the race, and Bergen as settled.
The June 2, 2026 primary was uncontested on both sides, which makes it a turnout reading and nothing more. Gottheimer drew 38,077 votes, 31,803 of them in Bergen. Kirrane drew 19,529, with 12,151 in Bergen on the Bergen County Republican endorsed line, 4,864 in Sussex on the Sussex Hometown Conservative Team line and 2,514 in Passaic. The Republican share of the combined primary vote, 33.9%, was the highest of the four district boards linked at the foot of this page, which is the one primary fact that cuts against the price rather than for it.
The 5th District Ballot
Three lines are on the general election list the Division of Elections issued on September 4, 2026. Josh Gottheimer of Ridgewood carries the incumbent's asterisk and has represented the 5th since January 3, 2017, now in his fifth consecutive term. Sean Kirrane of River Vale is the Republican line. Adam Rueda of Newton, in the Sussex portion, runs under the slogan Humane Sustainable Future. Kalshi writes contracts on the two parties only, and Polymarket's market on another party winning showed no volume as of October 5, 2026, so the third line touches the price only through whichever column its votes come out of.
What the 5th District Money Says
As of October 5, 2026, the venues had matched $37.6K on this market, $25.2K on the Democratic contract and $12.4K on the Republican, still the smallest total of the four district boards here. The books have moved toward each other on the Republican side: on September 28, 2026 Kalshi's Republican quote stood four points above Polymarket's and was the highest Republican price on the four boards, and by October 5, 2026 the cheapest Republican Yes was Polymarket's 3%, a point under Kalshi's. On the Democratic contract the cheapest Yes that day was Polymarket's 95%, three points under Kalshi's quote, now the widest split between the venues on any of the four boards. Kalshi's HOUSENJ5-26 contracts opened on July 1, 2025; Polymarket's event was created on December 16, 2025 and showed $30.7K of volume against $37.2K of posted liquidity on the October date.
The Case Against the 5th District Read
The strongest case against the read is that a one-county margin is a one-county risk. Two of the three county portions vote Republican and both grew their Republican margins between 2022 and 2024, so the seat is a Bergen margin minus a rising Sussex and Passaic deficit, and the whole of it, 43,072 votes in 2024, was under fifteen points of Bergen's two-party vote. A reader who holds the other view would point out that Kalshi's Republican contract stood higher here on September 28, 2026 than on the 3rd, 9th or 12th boards, and that the Republican share of the June 2, 2026 primary electorate, 33.9%, was the highest of the four. The week to October 5 took that premium away with no poll of the district on Ballotpedia's page and no change from the four rating outlets, which have not moved since August 4, and the counterread asks what the market learned in that week.
The second objection is the incumbency term itself. A fifth-term member's margin includes whatever share of Bergen votes for the name rather than the party, and no result on this page separates the two; the market prices the whole margin as structural because it has no way to price the part that would leave with the incumbent. That is a reasonable default for a seat that has been held through five elections, and it is also the assumption that a two-cycle sample of stability cannot prove.
What Changes the 5th District Read
The read is wrong if a named public poll puts the 5th inside five points before November 3, 2026, or if Kirrane's October quarterly report shows him ahead of a fifth-term incumbent on receipts. Each test has a date, and none of them is a price move.
• September 30, 2026: the October quarterly reporting period closed, the last full quarter before the vote; the totals stay private until the reports are filed.
• October 13, 2026: the voter registration deadline; the statewide statistics the Division of Elections publishes after it are the first count of the electorate the read depends on.
• October 15, 2026: the quarterly report is due at the Federal Election Commission, the first side-by-side reading of receipts since both nominees ran unopposed in June.
• October 22, 2026: the pre-general report, covering October 1 through 14, shows whether either campaign is spending in Bergen in the closing weeks.
• October 24 to November 1, 2026: early voting, with mail-in ballots in circulation since September 19 and mail applications accepted through October 27.
• November 3, 2026: election day, 6 a.m. to 8 p.m.
When the 5th District Market Resolves
On Kalshi the question is who is sworn in; on Polymarket it is who won. The HOUSENJ5-26 Democratic contract resolves Yes if the House member sworn in for NJ-05 for the term beginning in 2027 is a member of the Democratic Party, the Republican contract if that member is a Republican, and either can be determined early once a consensus of media organizations projects the winner. Polymarket's NJ-05 House Election Winner market resolves on the party of the candidate who wins on November 3, 2026, by ballot-listed affiliation at the time all 2026 House elections are called, on a consensus of credible reporting, with the Federal Election Commission's official results as the sole authority if reporting is ambiguous, and with an unaffiliated winner assigned to the party they most recently said they would caucus with.
The state's calendar runs underneath both. Polls close at 8 p.m. on November 3; postmarked mail ballots are accepted through November 9; the county boards of canvassers meet at noon on November 18; recount applications are due by November 21; and the Board of State Canvassers certifies on or before December 3, 2026. The Twentieth Amendment then seats the winner at noon on January 3, 2027, which is the only date on which Kalshi's contracts and Polymarket's could ever come apart.
Related New Jersey House Markets
The 3rd District is the other seat where one county carries the margin, Burlington there rather than Bergen; the 9th District is where Bergen's other portion went Republican in 2024; and the 12th District is the open seat. The politics desk lists every New Jersey contract with a page, the elections ballot sets the House races beside the Senate race, and the markets index holds the statewide set.