Christian respondents were further broken down into branches.

This page provides some summary lists of the largest religious groups in the United States.

This would equate to 3% of the U.S.

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Christian includes Protestant, Catholic, Mormon, Orthodox, and other, including non-denominational.

population, or roughly 1 in every 33 people in the country.

(The entire Glenmary data set is available at , and in parsed-out HTML table form as part of the main data set.) The existence of two extensive studies: Glenmary (based on organizational reporting) and Kosmin/NSRI (based on statistical sampling of self-identification), both for 1990, provides a high degree of reliability and an interesting opportunity to correlate self-identification figures with organizational reporting figures.

Lachman and associates at the Graduate School of the City University of New York.

In fact, the Southern Baptist Convention itself, reported a membership decline in 1998, and for other years, in which it has reported growth, the reported growth has been far smaller than the national population growth.


Baha'i population are about 113,000, or about 0.05% of the U.S.

Prior to 1977, the question excluded Orthodox and simply asked: What is your religious preference -- is it Protestant, Roman Catholic or Jewish?It is possible that the wording of this question leads to an undercount of groups not specifically mentioned in the question.

On 31 March 2000 received information from the U.S.

Also, many American Muslims are new immigrants and do not have phones, or are reluctant to participate in phone interviews, due to their alternative legal immigration status.

National Spiritual Assembly listing the number of U.S.

The first determined people's general religion: What is your religious preference -- Protestant, Roman Catholic, Jewish or an Orthodox religion such as the Greek or Russian Orthodox Church?Then, if the respondent said they were a Protestant, a follow up question was asked: What specific denomination is that?Observations
Some observations can be made about the Gallup polling data.

This indicates that the Wiccan/pagan population in the U.S.

In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.These figures are the results of responses to two questions.

population, not just the Christian population.

For results based on this sample, one can say with 95 percent confidence that the maximum error attributable to sampling and other random effects is plus or minus 3 percentage points.

More detailed denominational family statistics are shown .

(The figures for these religious bodies are probably part of the aggregate figure in this study's "Black Baptists Estimate" category.) The other religious bodies in this "Top 10 Religious Bodies" list (from Kosmin) were also detailed in the Glenmary study.