Horizon · our Election Day forecast: polls, plus fundamentals like incumbency, fundraising and past results.

Pulse · polls only: where the races stand today, with no fundamentals and wider uncertainty.

What's the difference?

New Hampshire · New Hampshire House of Representatives: Hillsborough 39 · Updated Oct 16, 2026

Tommy Katsiantonis

Democratic

Electoral history

Earlier races in New Hampshire, newest first, matched by name in the results archive.

  1. 2024

    House of Representatives · HD-515 Nov 5, 2024

    D · 22.2% · 2,092 votes

    Lost
  2. 2020

    House of Representatives · HD-515 Nov 3, 2020

    D · 18.7% · 1,721 votes

    Lost
  3. 2016

    House of Representatives · HD-515 Nov 8, 2016

    D · 28.1% · 2,204 votes

    Won
  4. 2014

    House of Representatives · HD-515 Nov 4, 2014

    D · 28.4% · 1,580 votes

    Won
  5. 2014

    House of Representatives · HD-515 primary · Sep 9, 2014

    D · 57.4% · 221 votes

    Won
  6. 2012

    House of Representatives · HD-515 Nov 6, 2012

    D · 29.1% · 2,308 votes

    Won
  7. 2010

    House of Representatives · HD-515 Nov 2, 2010

    D · 20.0% · 1,332 votes

    Won
  8. 2008

    House of Representatives · HD-515 Nov 4, 2008

    D · 18.2% · 2,022 votes

    Won
  9. 2006

    House of Representatives · HD-515 Nov 7, 2006

    D · 16.8% · 1,226 votes

    Lost
  10. 2004

    House of Representatives · HD-517 Nov 2, 2004

    D · 6.0% · 3,905 votes

    Lost
  11. 2002

    House of Representatives · HD-HILLSBOROUGH 50 Nov 5, 2002

    D · 4.4% · 3,301 votes

    Lost

Opponents in 2026