1972Final results
1972 election for Massachusetts State Senate: MIDDLESEX 7
Massachusetts State Senate · Massachusetts
Ronald C. Mackenzie (R) won with 65.4% of the vote, defeating William G. Shaughnessy (D) by 30.7 points.
Ronald C. MackenzieRepublican · winner · incumbent
65.4%39,350
William G. ShaughnessyDemocrat
34.6%20,849
60,199 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1972
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET