2018Final results
2018 election for Arizona's 3rd District
U.S. House · Arizona
Raúl M. Grijalva (D) won with 63.7% of the vote, defeating Nicolas "nick" Pierson (R) by 27.7 points.
Raúl M. GrijalvaDemocrat · winner
63.7%114,650
Nicolas "nick" PiersonRepublican
36.1%64,868
179,922 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.
Raúl M. GrijalvaNicolas "nick" Pierson
$713.3K
Raised by the campaign
$77.4K
$733.3K
Spent by the campaign
$71.6K
$38.2K
Cash on hand
$19
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018