• Sonoma County Voting

    May 4, 2021 - Election Calendar

May 4, 2021
Timeline Calendar

Special All-Mailed Ballot Election

Start DateDeadlineEvent
1/11/2021Nominations Open (Town of Windsor)
2/3/2021Within 24 Hours 
2/5/2021Nominations Deadline (Town of Windsor)
2/5/2021Consolidation deadline, measures
2/5/2021Tax rate statements deadline, bond measures
2/8/2021Measure letter assignment
2/8/2021Random alphabet drawing 
2/10/2021Deadline to amend/withdraw measure
2/12/2021*Argument deadline
2/12/2021*Impartial analysis due
2/19/2021Rebuttal deadline
(only if opposing arguments are filed)
3/5/2021Military/Overseas 60 Day Ballots
3/25/2021Deadline for First Pre-Election Campaign Finance Statement (1/1/2021 through 3/20/2021)
3/25/2021First day County Voter Information Guides may be mailed
4/5/2021Voting by mail opens 
4/13/2021First day to process Vote-by-Mail (VBM) ballots
4/18/20215/4/2021County of Sonoma 24-Hour Campaign Finance Reporting Period ($500 or more)
4/19/2021Regular voter registration deadline
4/20/20215/4/2021 Conditional (a.k.a. late) voter registration period
4/22/2021Deadline for Second Pre-Election Campaign Finance Statement (3/21/2021 through 4/17/2021)
4/27/2021Deadline to request VBM ballots by mail
5/4/2021Election Day (7 a.m. to 8 p.m.)
5/7/2021Last day to receive VBM ballots postmarked
no later than 5/4/2021
6/3/2021Deadline to certify election results

*For these dates that fall on a Saturday, Sunday, or county holiday, use the next regular business day for transactions. Specifically, the argument and impartial analysis deadlines move to February 16, 2021 from February 12, 2021 (February 12 is Lincoln’s Birthday, February 13 is Saturday, February 14 is Sunday, and February 15 is Presidents’ Day). A complete list of all county holidays during this period is as follows: February 12, 2021 (Lincoln’s Birthday); February 15, 2021 (Presidents’ Day); March 31, 2021 (César Chávez Day); May 31, 2021 (Memorial Day).

Contact Information

Deva Marie Proto

County Clerk-Recorder-Assessor-Registrar of Voters

Business Hours
Monday – Friday
8:00 AM – 5:00 PM


Registrar of Voters

435 Fiscal Drive

Santa Rosa, CA 95403
38.4657357, -122.7251823
Mailing Address
PO Box 11485
Santa Rosa, CA 95406-1485
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