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?

Massachusetts · Massachusetts House of Representatives: 5th Plymouth District · Updated Oct 16, 2026

David DeCoste

RepublicanIncumbent

Electoral history

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

  1. 2024

    House of Representatives · HD-115 Nov 5, 2024

    R · 100.0% · 19,410 votes

    Won
  2. 2022

    House of Representatives · HD-5 Nov 8, 2022

    R · 17.0% · 10,039 votes

    Lost
  3. 2020

    House of Representatives · HD-5 Nov 3, 2020

    R · 21.3% · 13,278 votes

    Lost
  4. 2018

    House of Representatives · HD-5 Nov 6, 2018

    R · 24.4% · 10,616 votes

    Lost
  5. 2016

    House of Representatives · HD-5 Nov 8, 2016

    R · 22.9% · 12,293 votes

    Lost
  6. 2014

    House of Representatives · HD-115 Nov 4, 2014

    R · 50.1% · 8,331 votes

    Won
  7. 2014

    House of Representatives · HD-115 primary · Sep 9, 2014

    R · 50.6% · 1,022 votes

    Won

Opponents in 2026