Census 2020

Image of Children and County Census logo

Despite the challenges of 2020, Contra Costa County had an extremely successful Census count. The County achieved the third highest Census 2020 self-response rate of all California counties with a rate of 77.4%. The County’s self-response rate also surpassed its Census 2010 rate of 72.1% by more than five points or a 5.3% increase. 

The County’s high response rate is owed in large part to the work of community-based organizations, cities, agencies, community partners, and trusted messengers who helped reach Contra Costa residents, including hard-to-count populations.   



  • Increased self-response rate by more than five points than 2010

  • Third highest self-response rate of all CA counties 

  • Second highest city self-response rate in state in Contra Costa County (Clayton) 

  • Developed strong relationships with 67 organizations throughout the county 

  • Increased participation of hard-to-count populations 

  • Nearly all cities in the County surpassed their 2010 rates, and those that did not were within 1% of doing so 

  • Strengthened regional relationships with other Bay Area counties and the State government.  


All during a global pandemic, time of social unrest, and a dangerous fire season 



What’s Next:

  • Data Delivery to the President 

  • Statue law says the data is to be delivered to president by December 31, 2020 but due to the pandemic, the USCB says it won’t be until the end of January at the earliest. 

  • 2020 Apportionment  Data was released on 4/26/2021. 

  • U.S. total resident population as of April 1, 2020 was 331,449,281 and California total resident population was 39,538,223

  • The statewide apportionment data is used to distribute the 435 seat in the U.S. House of Representatives. California will have52 seats, down one seat from 2010.

  • Explore the 2020 Apportionment Data

  • Redistricting 

  • The redistricting process is supposed to begin in Spring of 2021; however, this may also be delayed due to the pandemic. We will keep you posted about this. process as we learn more in the New Year.  

  • Using Census 2020 Data 

  • Check back here later to learn how Census 2020 data will be used moving throughout the next decade .

  1. Census 2020
  2. Censo 2020
  3. Senso 2020
  4. 2020 年人口普查
  5. Cuộc Điều Tra Dân Số 2020
  6. سرشماری سال 2020
  7. 2020 인구조사

Starting March 12, 2020 Contra Costa County residents will receive an envelope from the U.S. Census Bureau inviting them to fill out their Census form. These envelopes will be postmarked from Jefferson, Indiana and the letters will contain an ID code and instructions from the Census Bureau to get counted in the 2020 Census. 

English Video Guide to Completing the Census

American Sign Language Video Guide to Completing the Census

Find Video Guides in 59 different languages

Request a Speaker at Your Meeting or Event

Would you like someone to speak at your meeting or event? Please fill out our form.
We are available for virtual meetings or webinars during COVID-19 Shelter in Place

Be a Census Ambassador

Sign up to be a Census Ambassador. Please fill out our form.
We are looking for Census Ambassadors to assist with phone banking during the COVID-19 Shelter in Place

Receive Email Updates

Sign up to receive email updates. Please fill out our form.

Regional Census Workshops

Find copies of presentations and other information from our Regional Census Solution and Training Workshops.

Hard to Count Maps and Data

Find online mapping application, including details about over over 20 language communities in Contra Costa County

The Census Bureau is Hiring

Are you interested in a U.S. Census Bureau Job? The Census Bureau is looking for Contra Costa County residents for supervisory and non-supervisory jobs, paying $25 - $27.50 per hour.
Apply online 2020census.gov/jobs.

For more information or help applying, please call 1-855-JOB-2020 (1-855-562-2020)
Federal Relay Services 1-800-877-8339 TTY/ACSII

Media Inquiries

For media inquiries about the County’s Census 2020 efforts, contact the Director of Communications & Media at (925) 313-1183.

census-2020 logo We All Count one line