2018Final results
2018 election for Hawaii Senate District 21
Hawaii State Senate · Hawaii
Maile S. L. Shimabukuro (D) won with 58.9% of the vote, defeating Diamond Garcia (R) by 17.8 points.
Maile S. L. ShimabukuroDemocrat · winner · incumbent
58.9%5,808
Diamond GarciaRepublican
41.1%4,049
9,857 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