2018Final results
2018 election for Massachusetts House District 159
Massachusetts House of Representatives · Massachusetts
Ron Mariano (D) won with 68.7% of the vote, defeating Stephen F. Tougas (R) by 37.6 points.
Ron MarianoDemocrat · winner · incumbent
68.7%10,726
Stephen F. TougasRepublican
31.1%4,857
15,605 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET