2018Final results
2018 election for California's 16th District
U.S. House · California
Jim Costa (D) won with 57.5% of the vote, defeating Elizabeth Heng (R) by 15.1 points.
Jim CostaDemocrat · winner
57.5%82,266
Elizabeth HengRepublican
42.5%60,693
142,959 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
Money in this race
Each line compares the two campaigns on one scale.
Jim CostaElizabeth Heng
$1.9M
Raised by the campaign
$1.3M
$2.4M
Spent by the campaign
$1.3M
$109.9K
Cash on hand
$31.4K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018