East Bay Jewish Community Study 2011

Sponsor(s): Jewish Federation & Jewish Community Foundation of the East Bay

Principal Investigator(s): Anna Greenberg

Study Dates: 2011. January 31, 2011 and March 13, 2011.

Population Estimates:

100,700 Jewish individuals reside in 51,400 East Bay area Jewish households (see definitions under "Sample").

Another 76,100 non-Jews reside in these households.

Of the total of 176,800 people living in study area Jewish households, only 57% are Jewish, the lowest percentage of any US Jewish community which has had a random-digit dialed (RDD) survey.

Key Findings:

Summary of survey findings may be found on pages 1-5 of the Report.

Major sub-headings are:

Population and Demographic Characteristics of the Jewish Community;Defining the Jewish Population;Jewish Identity and Practice;Involvement in the East Bay Jewish Community;Charity in the Jewish Community;Feelings about the Jewish Community in the East Bay;Family Life and the Jewish Community;Israel and the East Bay; and, Reaching Out to Different Communities in the East Bay.


Geographic area encompassed four counties making up the greater East Bay region: Alameda, Contra Costa, Napa, and Solano Counties in California.

Households were defined as Jewish if the respondent identified his/her religion as Judaism, or considered self Jewish in some way, or had been born Jewish, or had Jewish parents, or was part of a household in which at least one person - - including only a child - - could be considered Jewish by the above criteria.

Sample Size: 820 interviews.

Sample Notes:

Study report indicates the researchers reached 820 Jewish households using a multi-modal, multi-sample design that included a representative, RDD (random-digit-dial) landline portion (N=621), as well as a Listed, non-RDD cell phone sample (N=100), and a consumer data list-based landline sample (N=199).

The report notes that only the Landline random-digit-dial (RDD) portion of the sample was used for population estimates.

Phone numbers for the cell phone sample were obtained from a list supplied by Info USA, "...which contained 8,635 records for the greater East Bay region that had been deemed likely to be Jewish by the vendor. This determination was made using consumer data, such as product purchases and subscriptions, as well as membership lists, surname lists, and other sources. As a result, [this] listed cell phone sample tends to over-represent older Jews, more affiliated Jewish families, and those with traditionally Jewish surnames. However, it provided the only feasible, cost-effective method for introducing cell phone sample into the methodology."

"Despite the known biases, we had hoped that this sampling method would still help us reach younger Jews. Unfortunately, respondents reached using the listed cell phone sample tended to be older than those reached through the RDD landline sample."

Study Notes:


The study's research methodology is described in detail on pages 95-111.

Sampling Disposition on pages 103-104;

Sampling Error analysis on page 109 - please note that the 176,800 population base used is Total People in Jewish households, not "Jews."


The survey questionnaire, with frequencies, is included in the Main Report (numbered report pages 112-128), but also has been copied and is downloadable separately below under Documentation.

The questions used for screening Jewish and non-Jewish households are listed on numbered page 100 of the Main Report (and have been added to Documentation below, in a more accessible retyped format by the Data Bank)


No Data on Jewish Status on a Child-by-Child Basis

Please note that neither the screener nor the questionnaire specifically asked the Jewish-raised status for each child in the household; thus, the Data Bank FAQ on "Intermarriage" will not include an estimate for the percentage of children in intermarried Jewish households who are being raised Jewish or partially Jewish.

The estimation of the number of Jewish persons in each household was apparently based on answers to question 14 in the Screener.


Data File

The data file has been made available by the East Bay Jewish Federation and Foundation through GQRR Research - 820 Jewish respondents.

See the methodology section for discussion of post-stratification and additional weighting adjustments for age of the respondent.

MASAWT is default weight in the Data Bank files below since it matches the results shown in the questionnaire and Frequencies section.

Number of interviews = 820.


Screening Questions:

Screener Question 11 (...what is your religion?) was answered as Judaism/Jewish by 400 respondents;

Screener Question 12 (if respondent was not Jewish by religion) ..."Do you consider yourself to be Jewish in anyway?" was answered Yes by 420 respondents.

If respondent answered Not Jewish to both of these screening questions, they were asked Q13 - Does any other member of your household consider self Jewish? Report notes that there were "...five respondents that did qualify as Jewish households based on the follow-up question... but they all subsequently ―broke-off, or refused to complete the survey."


Contact person at the Jewish Federation & Jewish Community Foundation of the East Bay as of 2011: Jessi Norris, Planning Associate [jessi@jfed.org]

Language: English


Survey Reports

» Main Report

» Executive Summary

Documentation, Questionnaires and Frequencies

» Screener

» Questionnaire and Frequencies

Data Files and Data Definitions

» Zipped SPSS Data File

Bookmark and Share