Redistricting and Reapportionment

Legislative districts, school district trustee areas, and city council district boundaries are reviewed every 10 years following the Census. The boundaries of these districts have changed in Yolo County as of 2021.

Background

State Redistricting

County Redistricting

City and School Districts

Resources and Links

Background

Article I, Section 2 of the Constitution of the United States mandates a count (census) of people living in the United States every 10 years. The first census after the American Revolution was taken in 1790. The U.S. Census Bureau’s primary purpose is to allocate (reapportion) the seats in the U.S. House of Representatives to each state based on the population in each state.

The number of members of the House of Representatives is capped at 435 and each member must represent roughly the same number of residents. Due to changes in population, California now has 52 Congressional districts – one less than prior to the 2020 census. Even when the number of seats has not changed, states determine the boundaries of their Congressional districts in a process called redistricting.

State Redistricting

As a result of population changes, the boundaries for the Congressional, State Senate, State Assembly, and Board of Equalization districts were modified.

The California Citizens Redistricting Commission is responsible for eliciting public input and determining the new boundaries. The 14-member Commission is made up of five Republicans, five Democrats, and 4 members not affiliated with either of those two parties. The Commission drew the lines with strict, nonpartisan rules designed to create districts of relatively equal population that will provide fair representation for all.

In Yolo County, the offices of U.S. Representative in Congress, State Assembly, and State Board of Equalization are up for election in 2022 and will appear on the ballot. The 3rd State Senate District seat is up for election in 2024.

Below is a list of districts in Yolo County and a description. The California Citizens Redistricting Commission has all final maps on its website.

State Assembly District 4

All of Yolo County
All of Napa, Lake, and Colusa Counties
Portion of Sonoma County

State Senate District 3

All of Yolo County
All of Napa and Solano Counties
Portions of Contra Costa, Sacramento, and Sonoma Counties

U.S. Congress District 4

Most of Yolo County
All of Napa and Lake Counties
Portions of Solano and Sonoma Counties

U.S. Congress District 7

All of the City of West Sacramento
Portion of Clarksburg
Portions of Sacramento and Solano Counties

Board of Equalization District 1

All of Yolo County
19 counties in eastern California from Siskiyou to a portion of San Bernardino

County Redistricting

Section 21500 of the California Elections Code requires the County Board of Supervisors to review and adjust the supervisorial districts to equalize population counts. The Yolo County Board of Supervisors formed the Yolo County Advisory Redistricting Commission (ARC) to assist them in updating the supervisorial maps. The ARC held six public meetings, received a significant amount of input from the public, and chose three maps to recommend to the Board of Supervisors. For more information about the process, go to the Yolo County Redistricting webpage.

The Board of Supervisors further conducted two public hearings and on November 23, 2021 adopted the final map.

Description of each Supervisorial District:

1st Supervisorial District

Most of City of West Sacramento
Clarksburg
Portion of Yolo Bypass Wildlife Area
Deep Water Ship Canal

2nd Supervisorial District

Portion of Davis
Winters
Unincorporated Winters
Unincorporated West Davis/West Plainfield/Yolo County Airport

3rd Supervisorial District

Northern Area of City of West Sacramento
Portion of City of Woodland
Unincorporated West Woodland/Monument Hills
Unincorporated East Woodland/Elkhorn

4th Supervisorial District

Portion of Davis
Unincorporated East Davis
El Macero
Portion of Yolo Bypass Wildlife Area

5th Supervisorial District

Portion of City of Woodland
Brooks
Capay
Dunnigan
Esparto
Guinda
Knights Landing
Madison
Rumsey
Yolo
Zamora

City and School Districts

The boundaries of cities and school districts do not change as a result of the Census. Rather, it is the "sub-districts" within those jurisdictions, such as city council districts and trustee areas, that are reviewed for changes in population.

The following cities and school districts reviewed their jurisdictions for population changes:

City of Davis
City of Woodland
City of Winters - Voted upon "at-large." No council districts.
City of West Sacramento - Currently transitioning to city council districts from at-large representation

Colusa County Board of Education - Colusa County BOE within Yolo County remains Trustee Area 1
Sacramento County Board of Education - Sacramento County BOE within Yolo County remains Trustee Area 6
Yolo County Board of Education

Los Rios Community College District - Los Rios CCD within Yolo County remains Trustee Area 4
Solano Community College District - Solano CCD within Yolo County remains Trustee Area 7
Yuba Community College District - Yuba CCD within Yolo County remains Trustee Areas 5 and 6