Proposition B, officially the Term Limits for Mayor and Board of Supervisors Charter Amendment, is a legislatively referred measure that appeared on the June 2, 2026, ballot in San Francisco, California.
The measure, which sought to establish lifetime term limits of two four-year terms for San Francisco's mayor and board of supervisors, was approved by voters in a 53% to 47% vote, making San Francisco the first city in California to impose lifeterm term limits.
Background and impact Prior to the passing of Proposition B, San Francisco used consecutive term limits, where the city's mayor and supervisorial board were able to serve two consecutive four-year terms, leave office for four years, and then run for their respective position again.
Proposition B will implement stricter lifetime term limits, prohibiting former elected officials from running for the same office after serving two consecutive four-year terms.
Opponents argued that the measure's wording specifically targeted Aaron Peskin, a former supervisor and the only elected official in San Francisco to return to office after serving two consecutive terms and waiting four years.
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