LAST TWO PUBLIC HEARINGS: Monday, November 1st at 6:00 PM &
                                                       Tuesday, November 2nd at 2:00 PM


If you haven't supplied your Community of Interest Worksheet please do so now (even if you only want to tell us that you like the district lines as they currently are.) You can do that at


The U.S. Census Bureau released block-level data on August 12, 2021, HOWEVER, California law only allows us to use the data from the statewide redistricting database which we are now waiting upon. Look for draft maps to be released three weeks after that database is released. You can receive an email when those post to the website by signing up for News Flash announcements.. 

September 2021

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  1. Mon, Nov 1

    Redistricting Public Hearing #4 Fourth public hearing for the redistricting proces...
    Read On
  2. Tue, Nov 2

    Redistricting Public Hearing #5 Fifth public hearing for the redistricting process...
    Read On
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Notices and Agendas for Public Hearings.

How to Participate

We invite all Mariposa County residents to participate in the redistricting process. 

Please review and understand the legally required map criteria (found above) before suggesting a map boundary. Send an email to if you have any questions about it.

  • Submit a Community of Interest Worksheet 
  • Attend public meetings. Meeting audio will be live broadcast on the County's website.
  • Call in to public meetings to make live comments by phone. All meetings will have a call-in option for the public to make comments to the commissioners. The phone number is 1 (224) 501-3412; access code 380-677-133. This number can also be found on page 1 of every Board agenda.
  • Submit an eComment on a posted agenda on the County website. (Go to, click on the date of your meeting of choice, then click on the text bubble next to the specific item you wish to comment on.)
  • Draft your own map.
  • Submit any comments prior to 6:00 pm, November 22, 2021 on this site using this form, or by sending an email to 
  • Send hard copies to the Clerk of the Board, PO Box 784, Mariposa, California 95338. (Must be received prior to the 6:00 pm, November 22, 2021 deadline.)
  • Deliver hard copies to the Clerk of the Board in the Mariposa County Government Center. 5100 Bullion Street, 2nd Floor, Mariposa, California 95338. (Must be received prior to the 6:00 pm, November 22, 2021 deadline.)

All comments and submissions will be available for the public and the Board to review.


Community of Interest form - hard copy (PDF)
Community of Interest form - online submission

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GIS Mapping tool for the public!

Explanation of the Redistricting Process

Every ten years, local governments redraw their district lines to reflect how local populations have changed and to provide that each district contains roughly the same number of people. This ensures that each board member represents about the same number of constituents. 

In Mariposa County, the Board of Supervisors is responsible for drawing supervisorial districts. Redistricting is done using county-level U.S. Census data, which is late this year but is anticipated to be released around September, 2021. For the County of Mariposa, the redistricting process must be completed by December 15th (which is the mandated 179 days prior to the next regular election.) Because of the lateness of the release of the necessary census data, legislation has been introduced that may change these timelines. We will keep you informed should changes occur.


You can find a map of the County’s current supervisorial districts here:

What Criteria Must be Used When Drawing District Lines?

Five districts with fairly equal populations which, to the extent that it is practicable, have district lines following the criteria below in this order of priority: 

(1) Geographically contiguous (each supervisorial district should share a common border with the next.) 

(2) Geographic integrity of local neighborhoods or local communities of interest shall be respected in a manner that minimizes its division. 

(3) Geographic integrity of census designated places must be maintained in a way that minimizes division. 

(2020 census data is not yet available on the county-level, however, in 2011, census designated places in Mariposa County were Bear Valley, Bootjack, Buck Meadows, Catheys Valley, Coulterville, El Portal, Fish Camp, Greeley Hill, Hornitos, Lake Don Pedro, Mariposa, Midpines, Wawona, and Yosemite Valley.) 

(4) Easily identifiable boundaries that follow natural or artificial barriers (rivers, streets, highways, rail lines, etc.), and

(5) Geographically compact districts (where practicable and where it does not conflict with the preceding criteria), so that nearby populations are not bypassed in favor of more distant populations. 

Lastly, boundaries shall not consider the incumbent's address, nor will they be drawn for purposes of favoring or discriminating against a political party.


For Information on State Redistricting which is different from the County process and its laws, visit

This Page Last Updated:
July 17, 2021, 7:07 PM

New!! G.I.S. Mapping Tool

Recordings or Written Summaries of Public Hearings

Next Public Hearing scheduled for Wednesday, September 15, 2021 at 2:00 PM.

Public Engagement Log

Draft maps considered by the Board at Public Hearings.

Draft maps cannot be produced until the block-level census data is released.

Adopted Final Map of Supervisorial District Boundaries.

Final map adoption is currently scheduled for December 7, 2021.

**Webmaster: This webpage must be maintained for 10 years pursuant to Elections Code Section 21508(g). Do not delete or unpublish before 2031.