Disability Prevalence Report

Acknowledgement

Special thanks to the following individuals who have contributed to the success of this effort: Deb Brucker, Erin Dame, Adam Lavoie, Rachel Coleman, Kate Filanoski, 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 90RT5022-02-01; and the Rehabilitation Research and Training Center on Employment Policy and Measurement (EPM-RRTC), also funded by NIDILRR, grant number 90RT5037-01-00. 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.

 

 

 
 
 
 

Institute on Disability / UCED
10 West Edge Drive, Suite 101
Durham, NH 03284
603.862.4320 | relay: 711 | contact.iod@unh.edu
www.iod.unh.edu

2015 California Report for County-level Data: Prevalence

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rehabilitation Research and Training Center on
Disability Statistics and Demographics
A NIDILRR-Funded Center

   NIDILIRR.jpg

 

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 (U.S.). This report is intended to be an online compliment 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 comes 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 2015, 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. These questions are:

  • Are you blind or do you have serious difficulty seeing, even when wearing glasses?

  • Are you deaf or do you have serious difficulty hearing?

  • Do you have serious difficulty walking or climbing stairs?

 
  • Because of a physical, mental, or emotional condition, do you have serious difficulty concentrating, remembering, or making decisions?

  • Do you have difficulty dressing or bathing?

  • Because of a physical, mental, or emotional condition, do you have difficulty doing errands alone such as visiting a doctor's office or shopping?

A response of ‘yes’ to any one of these six questions identifies an individual as having a disability in the ACS. 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.

Interpretation

The following statements are designed to help understand the 2015 county-level statistics from California that are presented:

  • For 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 9,967,829.

      • The county with the greatest number of total people was Los Angeles (9,968,960 people).

      • The county with the least number of total people was Alpine (1,131 people).

    • The average number of total people across all counties was 653,661.

    • The median, also known as the middle-most number, of total people across California counties was 179,286.

 
  • For 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 967,321.

      • The county with the greatest number of people with disabilities was Los Angeles (967,572 people).

      • The county with the least number of people with disabilities was Alpine (251 people).

    • The average number of people with disabilities across all counties was 68,058.

    • The median, also known as the middle-most number, of people with disabilities across California counties was 22,830.

  • For 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 9,000,508.

      • The county with the greatest number of people without disabilities was Los Angeles (9,001,388 people).

      • The county with the leastnumber of people without disabilities was Alpine (880 people).

    • The average number of people without disabilities across all counties was 585,602.

    • The median, also known as the middle-most number, of people without disabilities across California counties was 151,871.

 

Prevalence of People with and without Disabilities for California, by County: 2015

County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
California      37,912,312 3,947,390 10.4 33,964,922 89.6 Mono                14,072     1,199  8.5     12,873 91.5
Alameda          1,573,351   149,226  9.5  1,424,125 90.5 Monterey           410,004    36,922  9.0    373,082 91.0
Alpine               1,131       251 22.2        880 77.8 Napa               138,394    14,842 10.7    123,552 89.3
Amador              32,880     5,936 18.1     26,944 81.9 Nevada              97,618    13,870 14.2     83,748 85.8
Butte              220,313    37,596 17.1    182,717 82.9 Orange           3,098,794   258,350  8.3  2,840,444 91.7
Calaveras           44,382     8,548 19.3     35,834 80.7 Placer             363,472    39,456 10.9    324,016 89.1
Colusa              21,205     2,669 12.6     18,536 87.4 Plumas              18,802     4,072 21.7     14,730 78.3
Contra Costa     1,090,556   118,603 10.9    971,953 89.1 Riverside        2,275,526   251,316 11.0  2,024,210 89.0
Del Norte           24,021     5,400 22.5     18,621 77.5 Sacramento       1,449,885   185,210 12.8  1,264,675 87.2
El Dorado          181,005    22,666 12.5    158,339 87.5 San Benito          57,395     4,910  8.6     52,485 91.4
Fresno             945,353   117,014 12.4    828,339 87.6 San Bernardino   2,050,107   222,039 10.8  1,828,068 89.2
Glenn               27,732     4,769 17.2     22,963 82.8 San Diego        3,123,555   301,597  9.7  2,821,958 90.3
Humboldt           133,962    22,426 16.7    111,536 83.3 San Francisco      836,167    87,603 10.5    748,564 89.5
Imperial           167,772    23,434 14.0    144,338 86.0 San Joaquin        699,892    82,703 11.8    617,189 88.2
Inyo                17,934     2,320 12.9     15,614 87.1 San Luis Obispo    269,580    29,969 11.1    239,611 88.9
Kern               836,745    93,190 11.1    743,555 88.9 San Mateo          744,848    60,606  8.1    684,242 91.9
Kings              130,496    14,742 11.3    115,754 88.7 Santa Barbara      428,774    41,249  9.6    387,525 90.4
Lake                63,470    13,465 21.2     50,005 78.8 Santa Clara      1,859,170   144,096  7.8  1,715,074 92.2
Lassen              21,971     3,983 18.1     17,988 81.9 Santa Cruz         268,005    24,791  9.3    243,214 90.7
Los Angeles      9,968,960   967,572  9.7  9,001,388 90.3 Shasta             177,567    32,165 18.1    145,402 81.9
Madera             144,677    18,909 13.1    125,768 86.9 Sierra               2,991       540 18.1      2,451 81.9
Marin              253,123    22,994  9.1    230,129 90.9 Siskiyou            43,702     8,777 20.1     34,925 79.9
Mariposa            17,616     3,135 17.8     14,481 82.2 Solano             412,693    48,005 11.6    364,688 88.4
Mendocino           86,622    14,632 16.9     71,990 83.1 Sonoma             490,858    57,249 11.7    433,609 88.3
Merced             260,892    40,971 15.7    219,921 84.3 Stanislaus         524,038    70,303 13.4    453,735 86.6
Modoc                8,940     1,886 21.1      7,054 78.9 Sutter              94,038    12,868 13.7     81,170 86.3
County Total Disability No Disability   County Total Disability No Disability
Count % Count % Count % Count %
Tehama              62,585    12,269 19.6     50,316 80.4                                                          
Trinity             13,160     3,142 23.9     10,018 76.1                                                          
Tulare             449,747    51,997 11.6    397,750 88.4                                                          
Tuolumne            50,840     9,920 19.5     40,920 80.5                                                          
Ventura            834,057    85,878 10.3    748,179 89.7                                                          
Yolo               205,756    20,820 10.1    184,936 89.9                                                          
Yuba                71,111    12,320 17.3     58,791 82.7                                                          
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   
                                                                                                                   

Count of People with Disabilities for California, by County: 2015

Percentage of People with Disabilities for California, by County: 2015

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 (www.census.gov/programs-surveys/acs/).

  • Statistics are based on a sample and subject to sample variation (a discussion of this topic can be found here).

  • Statistics based on a sample may not fully represent the total U.S. population (a discussion of this topic can be found here).

  • People responding to the ACS may be different than people not responding (a discussion of this topic can be found here).

  • When people do not respond to all ACS questions their responses are created based on assignment or allocation (a discussion of this topic can be found here).

Additional resources for the ACS:

  • Information on the disability questions can be found here.

  • The ACS design and methodology can be found here.

  • The ACS questionnaire and instructions can be found here.

Definitions

Average—The sum of all of the values in a sample divided by the number of values in the sample.
Median—The middlemost value of a sample that separates the upper half of the values from the lower half of the values.
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.
Population—The total number of inhabitants in a defined geographic area including all races, classes, and groups.
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.

Rehabilitation Research and Training Center on Disability Statistics and Demographics

Policymakers, program administrators, service providers, researchers, advocates for people with disabilities, and people with disabilities and their families need accessible, valid data/statistics to support their decisions related to policy improvements, program administration, service delivery, protection of civil rights, and major life activities. The StatsRRTC supports decision making through a variety of integrated research and outreach activities by (a) improving knowledge about and access to existing data, (b) generating the knowledge needed to improve future disability data collection, and (c) strengthening connections between the data from and regarding respondents, researchers, and decision makers. In this way, the Stats RRTC supports the improvement of service systems that advance the quality of life for people with disabilities.

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 90RT502201, from 2013–2018.

Employment Policy and Measurement Rehabilitation Research and Training Center

The EPM-RRTC generates and translates new information about disability employment policy and ways to measure the labor market experiences of people with disabilities. By improving the quality of available information about program interactions, policy options, and employment outcomes, the EPM-RRTC increases evidence-based advocacy and policymaking.

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.