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Santa Clara County

1,940,147 Population
1,074,450 Voters
Districts
Countywide D1 D2 D3 D4 D5
Districts
Countywide District 1 District 2 District 3 District 4 District 5
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Santa Clara County

1,940,147 Population
1,074,450 Voters
Districts
Countywide D1 D2 D3 D4 D5
Districts
Countywide District 1 District 2 District 3 District 4 District 5

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Supervisor District 1

Candidates

Per-candidate cumulative totals from their committees, plus outside spending for or against them.
Candidate Raised Spent Cash Late (497) IE Support IE Oppose
Sylvia Arenas
Santa Clara County Supervisor
Sylvia Arenas for Supervisor 2026
~$XXX,XXX ~$XX,XXX ~$XX,XXX ~$X,XXX ~$XXX,XXX —
Rebecca Munson
Educator/Board Member
Munson for County Supervisor 2026
~$X,XXX ~$X,XXX ~$XXX — ~$X,XXX —
Sylvia Arenas
Santa Clara County Supervisor
Raised
~$XXX,XXX
Cash
~$XX,XXX
IE +
~$XXX,XXX
IE −
—
Rebecca Munson
Educator/Board Member
Raised
~$X,XXX
Cash
~$XXX
IE +
~$X,XXX
IE −
—

Independent expenditures

Outside spending for or against candidates in this race, broken down by candidate, committee, or individual filing.
Candidate Support Oppose Total Details
Sylvia Arenas ~$XXX,XXX ~$XXX ~$XXX,XXX
Rebecca Munson ~$X,XXX ~$XXX ~$X,XXX
Committee Support Oppose Total Details
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council ~$XXX,XXX ~$XXX ~$XXX,XXX
California Taxpayer Protection Committee ~$X,XXX ~$XXX ~$X,XXX
Date Committee Candidate Position Description Amount
May 20, 2026 California Taxpayer Protection Committee Rebecca Munson Support Produced and Sent Text Messages in support of Rebecca Munson for Supervisor ~$X,XXX
May 15, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Field Program ~$XX,XXX
May 15, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Staff time ~$X,XXX
May 12, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone banking ~$XXX
May 9, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
May 9, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
May 7, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone banking ~$XXX
May 7, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone banking ~$XXX
May 5, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone banking ~$XXX
May 5, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Supplies for phone banking ~$XXX
May 4, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Mailer ~$XX,XXX
May 2, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
May 1, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Staff payroll ~$XXX
Apr 30, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone bankers ~$XXX
Apr 28, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone bankers ~$XXX
Apr 25, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
Apr 25, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
Apr 21, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone bankers ~$XXX
Apr 18, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 18, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 18, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 18, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 18, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 17, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Staff payroll ~$XXX
Apr 16, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Online ads ~$X,XXX
Apr 16, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for phone banking ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Field Program ~$XX,XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$X,XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Phonebanking ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Voter data ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Walkcards ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for kick off event ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for precinct walkers ~$XXX
Apr 11, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for kick off event ~$XXX
Apr 8, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Food for kick off event ~$XXX
Apr 2, 2026 South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council Sylvia Arenas Support Online ads ~$XX,XXX

Recent activity

Independent expenditures and late contributions filed in the last 90 days for candidates in this race.
North Coast States Regional Council of Carpenters Power PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 21, 2026
California Taxpayer Protection Committee
Independent expenditure ·supports ·Rebecca Munson
~$X,XXX
May 20, 2026
Laborers' Local 304 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 20, 2026
Laborers International Union of North America Local 652
Late contribution ·to Sylvia Arenas
~$X,XXX
May 17, 2026
Laborers Local 185 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 17, 2026
San Francisco Laboer's Local 261 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 17, 2026
Southern California District Council of Laborers PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 17, 2026
Northern California District COuncil of Laboers PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 17, 2026
Build Jobs PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 16, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XX,XXX
May 15, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$X,XXX
May 15, 2026
Silicon Valley MEPS PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 12, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 12, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 9, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 9, 2026
Donald Silva — Managing Partner, AutoMile
Late contribution ·to Sylvia Arenas
~$X,XXX
May 8, 2026
Lawrence Silva — Managing Partner, Quo Administrative Services
Late contribution ·to Sylvia Arenas
~$X,XXX
May 8, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 7, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 7, 2026
Laborers Pacific Southwest Regional Organizing Coalition PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 5, 2026
Teamsters Union Local No. 665 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 5, 2026
Laborers Local Union 270 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
May 5, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 5, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 5, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XX,XXX
May 4, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 2, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
May 1, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 30, 2026
SEIU Local 521 Candidate PAC SCC
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 29, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 28, 2026
Raul Tovar — Business Owner, R.A.C. Services LLC
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 27, 2026
Teamsters Local 350 PAC
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 27, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 25, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 25, 2026
Ernest Yamane — Architect, Steinberg Hart Architects
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 22, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 21, 2026
Jamie Arreola — Educator, Self-Employed
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 18, 2026
Surjit Bains — Retired, Retired
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 18, 2026
Shimrit Bahar — Not Employed, Not Employed
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 18, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 18, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 18, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 18, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 18, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 18, 2026
Mauricio Mejia — CEO, SVX Silicon Valley Exchange
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 17, 2026
Luis Polanco — Consultant, Self-Employed
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 17, 2026
Andy Kuang — Test Engineer, Quanta Manufacturing Inc.
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 17, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$XXX
Apr 17, 2026
South Bay Afl-Cio Labor Council Committee on Political Education Sponsored by South Bay Afl-Cio Labor Council
Independent expenditure ·supports ·Sylvia Arenas
~$X,XXX
Apr 16, 2026
Susan Arrillaga — Retired, Retired
Late contribution ·to Sylvia Arenas
~$X,XXX
Apr 16, 2026

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