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Sylvia Arenas

Sylvia Arenas

Supervisor • District 1
District1@bos.sccgov.orgWebsite(408) 299-5010
Term expires: 2027-01-04
Sylvia Arenas is one of Silicon Valley's most dedicated champions for children, families, and working communities — a native San Josean whose entire professional and political career has been guided by a single, consistent mission: making life better for the families and children who call the South Bay home. She assumed office on the Santa Clara County Board of Supervisors on January 2, 2023, representing District 1, with her current term ending January 4, 2027. A proud native of San José and the daughter of immigrant parents, Arenas learned the value of hard work and the importance of serving others from an early age. She was born and raised in San José and later moved to the Evergreen neighborhood, where she and her husband José have raised their two children for over two decades. She earned a Bachelor of Arts in human development with a focus in early childhood development from CSU East Bay, followed by a Master of Public Administration from the University of San Francisco. Her academic foundation shaped a career that began not in politics but in direct service to families. She launched her public service career working for the City of San José through what is now called Project Hope — a Parks, Recreation and Neighborhood Services program that is part of the Mayor's Gang Prevention Task Force. She went on to work for agencies such as FIRST 5 Santa Clara County, a statewide program bringing critical services to young children, and Gardner Health Services, a health center providing services to low-income families. Before reaching the Board of Supervisors, Arenas built her elected record at two levels of local government. In 2014, she was elected to the Evergreen Elementary School District Board of Trustees, where she served until she won the District 8 seat on the San José City Council in 2016. She won reelection to the council outright in the March 2020 primary against Jim Zito. During her six years on the council, she gravitated to issues affecting the everyday lives of San José women and families, and launched the city's Family Friendly Initiative — aimed at increasing access to early education, after-school programs, safe housing, family-friendly public facilities, and paid family leave. She also chaired the city's Neighborhood Services and Education Committee, where she convened joint hearings with the County Board of Supervisors to address the crisis in affordable child care. In the November 2022 general election, Arenas defeated Republican Johnny Khamis to win the District 1 seat on the Santa Clara County Board of Supervisors. The district is a broad one, encompassing communities across East San José, Evergreen, and surrounding areas. Since joining the Board of Supervisors, she has focused on the needs of children across the county, ensuring that equity informs public investments, and working to create systemic changes that level the playing field in the South Bay. Her priorities as supervisor have included expanding renewable energy, improving public safety, and strengthening mental health services for Santa Clara County's homeless population. She has also led the county's advocacy on child care funding, co-leading efforts to secure state investment in universal preschool and local subsidized care for the youngest children. Most recently, she and a coalition of ten other local governments and nonprofits filed a lawsuit against the Trump administration for upending federal grants for permanent housing — a sign of her willingness to use every tool available to protect her constituents from federal policy reversals. She was elected to a second term as Board of Supervisors President by her fellow supervisors, a recognition from colleagues of her steady leadership and collaborative approach. Her career is a testament to the power of rooting public service in lived community experience — from her immigrant family's values to the neighborhoods and families she has served for more than two decades.
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District staff
Patrick McGarrity
Director of Policy and Budget
patrick.mcgarrity@bos.sccgov.org(408) 299-5015
Alicia Fazal
Executive Assistant
alicia.fazal@bos.sccgov.org(408) 299-5013
Mariela Garcia
Senior Policy Aide
mariela.garcia@bos.sccgov.org(408) 299-5016
Victoria Lam
Housing, Land Use, Environment, and Transportation
victoria.lam01@bos.sccgov.org(408) 299-5014
Monica Rodriguez
Policy Aide
monica.rodriguez@bos.sccgov.org(408) 299-6910
Alec Chavez
Policy Fellow
alec.chavez@bos.sccgov.org(408) 299-5017
Adriana Sanchez
Administrative Assistant
adriana.sanchez01@bos.sccgov.org(408) 299-5010 (main line)
Cristian Cornejo
Community Relations Aide
cristian.cornejo@bos.sccgov.org(408) 299-5010 (main line)
David Ngô
Communications & Community Relations Aide
david.ngo@bos.sccgov.org(408) 299-6082
Joseph Farfan
Community Relations Aide
joseph.farfan@bos.sccgov.org(408) 299-6909
Rebecca Hall
Board Aide
rebecca.hall@bos.sccgov.org(408) 299-5019
Ruben Navarro
Community Relations Aide
ruben.navarro@bos.sccgov.org(408) 299-5018
Nancy Lê
Chief of Staff
nancy.l.le@bos.sccgov.org(408) 299-5012
Appointments
Vice Chair
Housing, Land Use, Environment and Transportation Committee
Chair
Children, Seniors and Families Committee (CSFC)
Recent news
Will San Jose protect 500+ acres around former IBM site?
San José Spotlight • 2026-10-22
San Jose Mayor Matt Mahan is pushing for permanent environmental protections for more than 500 acres of open space around a former tech research center being purchased by a data center developer. At an Oct. 16 Santa Tere…
San Mateo County Supervisors Receive 2030 Census Report: Narrows Who Counts, Redefines “Usual Residence”, Bans Race and Ethnicity; Children and Military Pay the Biggest Price
Coastside Buzz • 2026-10-22
VIDEO. From the San Mateo County Board of Supervisors regular meeting on Tuesday, October 6th, 2026 at 9:00am, as a hybrid meeting with remote… The post San Mateo County Supervisors Receive 2030 Census Report: Narrows Wh…
San Mateo County declares El Niño state of emergency to prepare for winter storms
The Almanac • 2026-10-21
The San Mateo County Board of Supervisors declared El Niño to be a local emergency Tuesday, easing the way for the county’s Department of Emergency Management to make preparations with fewer bureaucratic hurdles. The pos…
San Mateo County declares El Niño state of emergency to prepare for winter storms
Redwood City Pulse • 2026-10-21
The San Mateo County Board of Supervisors declared El Niño to be a local emergency Tuesday, easing the way for the county’s Department of Emergency Management to make preparations with fewer bureaucratic hurdles. The pos…
San Mateo County supes weigh zoning restrictions on data center construction
Bay City News / Local News Matters • 2026-10-21
The San Mateo County Board of Supervisors on Tuesday began making plans to look into changing its zoning rules to restrict the construction of data centers in the county’s unincorporated areas. “What we are contemplating…
Marin gives ICE cold shoulder: Supervisors vote to restrict assistance to federal agents
Bay City News / Local News Matters • 2026-10-21
Following two hours of public comment, the Marin County Board of Supervisors on Tuesday unanimously approved a policy prohibiting the use of county property, resources and information for federal immigration enforcement.…
Cesar Chavez Street to be renamed ‘Las Campesinas’
Mission Local • 2026-10-21
'Las Campesinas' is the name a working group created by the Mayor selected. The proposal will have to be approve by the board of supervisors. Cesar Chavez Street to be renamed ‘Las Campesinas’
Ariam Weldeab Araya heals immigrants through storytelling
East Bay Express • 2026-10-20
In one of the most difficult eras for immigrants in modern history, Oakland’s Ariam Weldeab Araya is making a difference. The Eritrean native, who immigrated to the U.S. in 2027, was named one of eight 2026 Arts Leadersh…
New San Francisco legislation would set new monetary threshold for evictions
Mission Local • 2026-10-20
Legislation passed in a unanimous vote at today’s board of supervisors meeting and supported by Mayor Daniel Lurie would bar evictions for renters who owe less than the fair-market value […] New San Francisco legislation…
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