2019 San Antonio mayoral election|
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| Turnout | 11.46%  (first round) 15.43%  (runoff)
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| Candidate | Ron Nirenberg | Greg Brockhouse |  
| First round | 49,579 48.67%
 | 46,414 45.56%
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| Runoff | 61,741 51.11%
 | 59,051 48.89%
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On May 4, 2019, the city of San Antonio, Texas held an election to choose the next mayor of San Antonio. The election was a nonpartisan blanket primary. As no candidate secured a majority of the vote (50% of all votes cast +1), a runoff was held on June 8, 2019, between the two top candidates, incumbent mayor Ron Nirenberg and San Antonio City Councilman Greg Brockhouse. In the runoff, Nirenberg narrowly defeated Brockhouse, 51.11% to 48.89%.