Myrna Melgar (born March 17, 1968) is an American politician currently serving as a member of the San Francisco Board of Supervisors for District 7 since January 8, 2021.

[6] She appeared to win re-election in 2024 against challenger Matt Boschetto, with 53% of the vote after applying ranked choice, as of a partial count on November 11, 2024.

[10] In 2021, Melgar was among the members of the Board of Supervisors who voted to block construction of a 495-unit apartment building (with 25% affordable housing) on the site of a valet parking lot.

The controversial vote prompted an investigation of the San Francisco Board of Supervisors by California state officials which was settled in the City's favor, and a $32,000 settlement was entered into.

Melgar frequently rides her electric bicycle to City Hall and has an established track record of advocating for public transit, active transportation, and pedestrian safety.

In 2022, Melgar established the Ocean Avenue Mobility Action Plan “to prioritize and identify funding for transportation, pedestrian safety, bike safety, and traffic circulation improvements for the Ocean Avenue corridor between Junipero Serra Boulevard and San Jose Avenue.” In 2024, after a traffic incident that resulted in the death of four pedestrians in West Portal, Melgar convened the Welcoming West Portal Committee consisting of merchants, neighbors, and advocates to identify safety measures to be implemented in the area.

In 2024, Melgar introduced a Resolution urging the City of San Francisco to settle their lawsuit with the Environmental Protection Agency in order to avoid sending the case to the Supreme Court of the United States and risk weakening the Clean Water Act.

In 2022, Melgar championed efforts to increase public safety in her district by advocating for additional funding for the ambassador program.

Working with Mayor London Breed, Melgar successfully secured funding for additional community ambassadors in the West Portal, Inner Sunset, and Ocean Avenue neighborhoods.

Melgar has led efforts to increase recruitment to the San Francisco Police Department by targeting female officers.

A report published in 2024 noted that Melgar was among the top donors to women running for local office in San Francisco.