The National Public Opinion Reference Survey (NPORS) is an annual survey of U.S. adults conducted by the "https://www.pewresearch.org/methods/fact-sheet/national-public-opinion-reference-survey-npors/" Target="_blank">Pew Research Center. The Pew Research Center uses NPORS to produce benchmark estimates for several topics, including Americans' political and religion affiliations.

"https://www.ipsos.com/en" Target="_blank">Ipsos conducted the National Public Opinion Reference Survey "https://www.pewresearch.org/methods/fact-sheet/national-public-opinion-reference-survey-npors/" Target="_blank">(NPORS) for the "https://www.pewresearch.org/" Target="_blank">Pew Research Center using address-based sampling and a push-to-web protocol. The survey was fielded June 1, 2020, to August 11, 2020. Participants were first mailed an invitation to complete an online survey. A paper survey was later mailed to a large subset (79%) of those who did not respond. In total, 1,862 respondents completed the survey online and 2,246 respondents completed the paper survey. The survey was administered in English and Spanish.

The National Public Opinion Reference Survey (NPORS) is an annual survey of U.S. adults conducted by the Pew Research Center. Respondents can answer either by paper or online, and they are selected using address-based sampling. The Pew Research Center uses NPORS to produce benchmark estimates for several topics, such as Americans' political and religious affiliations.

NPORS was conducted for the Pew Research Center by Ipsos. Participants were first mailed an invitation to complete an online survey. A paper survey was later mailed to those who did not respond. In total, 1,550 respondents completed the survey online and 2,387 respondents completed the paper survey. The survey was administered in English and Spanish.

The National Public Opinion Reference Survey (NPORS) is an annual survey of U.S. adults conducted by the "https://www.pewresearch.org/" Target="_blank">Pew Research Center. The Pew Research Center uses NPORS to produce benchmark estimates for several topics, including Americans' political and religion affiliations.

"https://www.ipsos.com/en-us" Target="_blank">Ipsos conducted the "https://www.pewresearch.org/methods/2024/07/08/how-pew-research-center-uses-its-national-public-opinion-reference-survey-npors/" Target="_blank">NPORS for Pew using address-based sampling and a multimode protocol. The survey was fielded Feb. 1, 2024, to June 10, 2024. Participants were first mailed an invitation to complete an online survey. A paper survey was later mailed to those who did not respond. In total, 2,535 respondents completed the survey online, 2,764 respondents completed the paper survey, and 327 respondents completed the survey over the phone (Total N=5,626). The survey was administered in English and Spanish. The AAPOR Response Rate 1 was 32 percent.