2020Final results
2020 election for Texas's 20th District
U.S. House · Texas
Joaquin Castro (D) won with 64.7% of the vote, defeating Mauro Garza (R) by 31.6 points.
Joaquin CastroDemocrat · winner
64.7%175,078
Mauro GarzaRepublican
33.1%89,628
Jeffrey BluntLibertarian
2.2%6,017
270,723 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Joaquin CastroMauro Garza
$705.6K
Raised by the campaign
$308K
$718.4K
Spent by the campaign
$291.2K
$115.7K
Cash on hand
$45.9K
Campaign money: FEC, through Dec 31, 2020.
Source: FEC campaign filingsUpdated Dec 31, 2020