2018Final results
2018 election for California Senate District 4
California State Senate · California
Jim Nielsen (R) won with 57.1% of the vote, defeating Phillip Kim (D) by 14.3 points.
Jim NielsenRepublican · winner · incumbent
57.1%190,441
Phillip KimDemocrat
42.9%142,817
333,258 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