2018 State Report for County-Level Data: Prevalence

Acknowledgements

Special thanks to the following individuals who have contributed to the success of this effort: Deb Brucker, Erin Dame, Kate Filanoski, Adam Lavoie, Kim Phillips, and Karen Volle.

Funding for this publication is made possible by:

The Rehabilitation Research and Training Center on Disability Statistics and Demographics (StatsRRTC), funded by the U.S. Department of Health and Human Services Administration for Community Living National Institute on Disability, Independent Living, and Rehabilitation Research (NIDILRR), grant number 90RTGE0001-01-00; and the Rehabilitation Research and Training Center on Employment Policy and Measurement (EPM-RRTC), also funded by NIDILRR, grant number 90RT5037-03-00. The information developed by the StatsRRTC and EPM-RRTC does not necessarily represent the policies of the Department of Health and Human Services, and you should not assume endorsement by the Federal Government (Edgar, 75.620 (b)).

The StatsRRTC and EPM-RRTC are part of the Institute on Disability at the University of New Hampshire. The Institute on Disability/UCED (IOD) was established in 1987 to provide a university-based focus for the improvement of knowledge, policies, and practices related to the lives of people with disabilities and their families and is New Hampshire’s University Center for Excellence in Disability (UCED). Located within the University of New Hampshire, the IOD is a federally designated center authorized by the Developmental Disabilities Act. Through innovative and interdisciplinary research, academic, service, and dissemination initiatives, the IOD builds local, state, and national capacities to respond to the needs of individuals with disabilities and their families.

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2018 California Report for County-Level Data: Prevalence

 

 

 

 

 

 

 

 

 

 

Rehabilitation Research and Training Center on

Disability Statistics and Demographics

A NIDILRR-Funded Center

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Introduction

The State Reports for County-Level Data on Prevalence are designed to provide the users of disability statistics with the number of people with disabilities for any given state and county in the United States. This report is intended to be an online complement to Section 1: Population and Prevalence of the Annual Disability Statistics Compendium and Annual Disability Statistics Supplement, providing greater detail within each state. The State Reports for County-Level Data on Prevalence can be used to compare county-level statistics between counties in any given state or states.

The following report provides county-level statistics for California. The proportions of people with disabilities, sometimes called prevalence, presented in the State Reports for County-Level Data is a useful tool for advocates, researchers, and policy-makers to plan and provide services and supports for people with disabilities. In this report, the prevalence of people with disabilities is presented as the number of people with disabilities in a given state and county per total state and county populations, respectively. Counts and percentages are provided in tables and maps.

The data for this report come from the American Community Survey 5-year data. The American Community Survey (ACS) is a national survey developed by the U.S. Census Bureau to provide information on a number of topics about social, economic, and demographic characteristics of the U.S. population. ACS 5-year data is collected over a longer period of time than 1-year data, providing larger sample sizes and increased reliability for less populated areas and small population subgroups. All of the statistics in this report use the ACS 5-year data which includes data from the year of the report and data from the four previous years. In the ACS, people are identified as having a disability based on responses to a series of six questions asking about having difficulties with vision, hearing, ambulation, cognition, self-care, and independent living (see glossary for further details).

Specific to California, the state chosen for this report, sentences providing interpretation and context for prevalence statistics are included below. A short glossary of terms is also provided at the end of the report explaining the statistics that are illustrated in each sentence.

 

 

Additional Resources. The Annual Disability Statistics Compendium and its complement, the Annual Disability Statistics Supplement, are summaries of statistics about people with disabilities, available both in hard copy and online at https://www.disabilitycompendium.org.

Help navigating any of the resources described here can be found in the Frequently Asked Questions section at https://www.disabilitycompendium.org/faq. Assistance interpreting and locating additional statistics is available via our toll-free number, 866.538.9521, or by email, disability.statistics@unh.edu. For more information about our research projects, please visit https://www.researchondisability.org.

Suggested Citation. Boege, S.L., Lauer, E.A., & Houtenville, A.J., 2020. 2018 State Report for California County-Level Data: Prevalence. Durham, NH: University of New Hampshire, Institute on Disability.

Interpretation

The following statements are designed to help understand the 2018 county-level statistics from California that are presented:

  • For the number of people with and without disabilities:
    • The range of total people across California counties, also known as the difference between the largest and smallest counts of people across California counties, was 10,029,304.
      • The county with the greatest number of total people was Los Angeles (10,030,450 people).
      • The county with the least number of total people was Alpine (1,146 people).
    • The average number of total people across all counties was 666,447.
    • The median, also known as the middle-most number, of total people across California counties was 181,493.
  • For the number of people with disabilities:
    • The range of people with disabilities across California counties, also known as the difference between the largest and smallest counts of people with disabilities across California counties, was 992,798.
      • The county with the greatest number of people with disabilities was Los Angeles (993,035 people).
      • The county with the least number of people with disabilities was Alpine (237 people).
    • The average number of people with disabilities across all counties was 70,512.
    • The median, also known as the middle-most number, of people with disabilities across California counties was 23,684.
  • For the percentage of people with disabilities:
    • For the entire state of California, the overall percentage of people with disabilities is 10.6%.
      • The county with the highest percentage of people with disabilities was Calaveras and Trinity (21.4%).
      • The county with the lowest percentage of people with disabilities was Mono (6.5%).

 

  • For the number of people without disabilities:
    • The range of people without disabilities across California counties, also known as the difference between the largest and smallest counts of people without disabilities across California counties, was 9,036,506.
      • The county with the greatest number of people without disabilities was Los Angeles (9,037,415 people).
      • The county with the least number of people without disabilities was Alpine (909 people).
    • The average number of people without disabilities across all counties was 595,936.
    • The median, also known as the middle-most number, of people without disabilities across California counties was 153,414.
  • For the percentage of people without disabilities:
    • For the entire state of California, the overall percentage of people without disabilities is 89.4%.
      • The county with the highest percentage of people without disabilities was Mono (93.5%).
      • The county with the lowest percentage of people without disabilities was Calaveras and Trinity (78.6%).
Prevalence of People with and without Disabilities for California, by County: 2018
County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
  California    38,653,948 4,089,685 10.6 34,564,263 89.4      Mono           14,059       915  6.5     13,144 93.5
    Alameda      1,634,128   153,134  9.4  1,480,994 90.6    Monterey        416,906    37,176  8.9    379,730 91.1
    Alpine           1,146       237 20.7        909 79.3      Napa          138,703    16,313 11.8    122,390 88.2
    Amador          34,174     6,308 18.5     27,866 81.5     Nevada          98,103    14,614 14.9     83,489 85.1
     Butte         224,510    38,146 17.0    186,364 83.0     Orange       3,147,477   269,618  8.6  2,877,859 91.4
   Calaveras        44,842     9,603 21.4     35,239 78.6     Placer         377,358    40,330 10.7    337,028 89.3
    Colusa          21,297     2,629 12.3     18,668 87.7     Plumas          18,544     3,411 18.4     15,133 81.6
 Contra Costa    1,128,003   126,742 11.2  1,001,261 88.8    Riverside     2,361,744   269,797 11.4  2,091,947 88.6
   Del Norte        24,362     5,121 21.0     19,241 79.0   Sacramento     1,495,461   181,448 12.1  1,314,013 87.9
   El Dorado       185,338    24,687 13.3    160,651 86.7   San Benito        59,259     5,562  9.4     53,697 90.6
    Fresno         966,908   126,139 13.0    840,769 87.0 San Bernardino   2,084,508   227,837 10.9  1,856,671 89.1
     Glenn          27,593     4,622 16.8     22,971 83.2    San Diego     3,204,470   314,897  9.8  2,889,573 90.2
   Humboldt        134,810    21,941 16.3    112,869 83.7  San Francisco     865,827    89,312 10.3    776,515 89.7
   Imperial        170,734    24,557 14.4    146,177 85.6   San Joaquin      723,069    89,397 12.4    633,672 87.6
     Inyo           17,681     2,489 14.1     15,192 85.9 San Luis Obispo    274,891    31,615 11.5    243,276 88.5
     Kern          854,578    95,441 11.2    759,137 88.8    San Mateo       762,101    65,049  8.5    697,052 91.5
     Kings         133,153    16,568 12.4    116,585 87.6  Santa Barbara     436,711    43,333  9.9    393,378 90.1
     Lake           63,451    12,766 20.1     50,685 79.9   Santa Clara    1,912,773   151,779  7.9  1,760,994 92.1
    Lassen          21,376     3,599 16.8     17,777 83.2   Santa Cruz       272,297    30,314 11.1    241,983 88.9
  Los Angeles   10,030,450   993,035  9.9  9,037,415 90.1     Shasta         177,648    31,671 17.8    145,977 82.2
    Madera         147,037    19,408 13.2    127,629 86.8     Sierra           2,903       384 13.2      2,519 86.8
     Marin         255,552    22,811  8.9    232,741 91.1    Siskiyou         43,429     8,410 19.4     35,019 80.6
   Mariposa         17,370     3,200 18.4     14,170 81.6     Solano         426,327    52,805 12.4    373,522 87.6
   Mendocino        86,575    14,566 16.8     72,009 83.2     Sonoma         497,067    60,313 12.1    436,754 87.9
    Merced         266,325    36,206 13.6    230,119 86.4   Stanislaus       536,175    70,933 13.2    465,242 86.8
     Modoc           8,714     1,581 18.1      7,133 81.9     Sutter          94,632    13,032 13.8     81,600 86.2
Prevalence of People with and without Disabilities for California, by County: 2018
County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
    Tehama          62,838    12,622 20.1     50,216 79.9                                                          
    Trinity         12,691     2,713 21.4      9,978 78.6                                                          
    Tulare         456,524    55,228 12.1    401,296 87.9                                                          
   Tuolumne         50,912     9,698 19.0     41,214 81.0                                                          
    Ventura        841,489    92,104 10.9    749,385 89.1                                                          
     Yolo          213,606    19,947  9.3    193,659 90.7                                                          
     Yuba           73,339    11,572 15.8     61,767 84.2                                                          
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
Count of People with Disabilities for California, by County: 2018

Percentage of People with Disabilities for California, by County: 2018

Discussion

There are a number of concepts and factors which complicate the interpretation of the estimates presented in this report. These concerns affect all statistics from population-based surveys. The estimates included in this document should be interpreted the following limitations in mind and generalized with caution. In each point, a link to the U.S. Census Bureau website describing the limitation or concept in greater detail in the ACS has been provided.

Additional links to resources for the ACS:

Glossary

American Community Survey (ACS) — The American Community Survey is a large, continuous demographic survey conducted by the U.S. Census Bureau that will provide accurate and up-to-date profiles of America’s communities every year. Annual and multiyear estimates of population and housing data are generated for small areas, including tracts and population subgroups. This information is collected by mailing questionnaires to a sample of addresses. See the U.S. Census Bureau website for additional details.

The Six Disability Questions in the American Community Survey:

  1. Is this person deaf or does he/she have serious difficulty hearing? (yes or no)
  2. Is this person blind or does he/she have serious difficulty seeing even when wearing glasses? (yes or no)
  3. (If person 5 years old or over) Because of a physical, mental, or emotional condition, does this person have serious difficulty concentrating, remembering, or making decisions? (yes or no)
  4. (If person 5 years or old over) Does this person have serious difficulty walking or climbing stairs? (yes or no)
  5. (If person 5 years old or over) Does this person have difficulty dressing or bathing? (yes or no)
  6. (If person 15 years old or over) Because of a physical, mental, or emotional condition, does this person have difficulty doing errands alone such as visiting a doctor’s office or shopping? (yes or no)

Average — The sum of all of the values in a sample divided by the number of values in the sample.

Civilian — A person not in active-duty military.

Median — The middlemost value of a sample that separates the upper half of the values from the lower half of the values. 

Non-Institutionalized Population — Describes individuals who are residing in the community and who are not living in institutions such as jails, prisons, nursing homes, hospitals, etc.

Population — The total number of inhabitants in a defined geographic area including all races, classes, and groups.

 

 

Prevalence — The proportion of the population with a particular status or condition. Prevalence is usually expressed as a percentage or a number of people per unit of the population.

Prevalence Rate — The prevalence of a particular status or condition estimated over a specific period of time.

Range — The difference between the largest and smallest values in a sample. In a sample, when the smallest value is subtracted from the largest value the resulting value is called the range. 

Sampling Variability — The variation of a statistic when estimated from repeated samples.

United States Census Bureau — An agency within the United States Federal Statistical System tasked with producing data about the American people and economy. Their primary task is to conduct the United States Census every ten years.

About the Center

Rehabilitation Research and Training Center on Disability Statistics and Demographics (StatsRRTC)

Led by the University of New Hampshire, the StatsRRTC is a collaborative effort involving the following partners: American Association of People with Disabilities, Center for Essential Management Services, Council of State Administrators of Vocational Rehabilitation, Kessler Foundation, Mathematica Policy Research, and Public Health Institute.

The StatsRRTC is funded by the U.S. Department of Health and Human Services, Administration for Community Living, National Institute on Disability, Independent Living and Rehabilitation Research under grant number 90RTGE00010100, from 2018–2023.

Employment Policy and Measurement Rehabilitation Research and Training Center (EPM-RRTC)

Led by the University of New Hampshire, the EPM-RRTC is a collaborative effort involving the following partners: Association of University Centers on Disability, Hunter College, Kessler Foundation, Mathematica Policy Research, and the University of Chicago.

The EPM-RRTC is funded by the U.S. Department of Health and Human Services, Administration for Community Living, National Institute on Disability, Independent Living and Rehabilitation Research under grant number 90RT503701, from 2015–2020.

Contact Information
University of New Hampshire, Institute on Disability
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Durham, NH 03824
Toll-Free Telephone/TTY: 866-538-9521
E-mail: Disability.Statistics@unh.edu
https://www.researchondisability.org