Census

"iPoll is a comprehensive, up-to-date source for US nationwide public opinion. A full-text retrieval system, the iPoll online database is organized at the question level, providing the tools to sift through nearly a half million questions asked on national public opinion surveys, 1935 to present. Surveys archived in the Roper Catalog were originally gathered by academic, commercial and media survey organizations such as Gallup Organization, Harris Interactive, Pew Research Associates, and many more"

The Oxford handbook of polling and polling methods / edited by Lonna Rae Atkinson and R. Michael Alvarez. Published: Oxford Oxford University Press, 2015-. " "This handbook is currently in development, with individual articles publishing online in advance of print publication. At this time, we cannot add information about unpublished articles in this handbook, however the table of contents will continue to grow as additional articles pass through the review process and are added to the site. Please note that the online publication date for this handbook is the date that the first article in the title was published online."

" A detailed listing of Pew Research Center polling and demographic topics and subjects."

"A compilation of questions and responses from more than 12,000 national, state, local and special surveys, conducted by 700 polling organizations in the United States and 70 other countries from 1986 through the present. Each record in the database consists of one poll question and the participants' responses. Records are indexed by subject matter, publication year, general and specific location, and survey method. Other information provided includes: source name and contact information, sample size, and notes on the sample population."

"The Roper Center archives datasets from thousands of surveys with national adult, state, foreign, and special subpopulation samples. These datasets are listed in the Catalog of Holdings, which provides a searchable description and unique archive identification number for each. Along with such basic information as survey organization, interview dates, and type of sample, most catalog entries include abstracts indicating the subjects covered by the questions in the survey"--FAQs page. Members can directly download the documentation and data files for studies for which The Roper Center holds the datasets"