More than public opinion surveys, but public opinion surveys are biggest category of religious data.

From the Fraser Institute..

Political, sociodemographic, and Wikipedia-related data on elected politicians across the globe for R environment..

Results of Danish general elections 1953-2015 including number of votes and number of seats in parliament.

A continuous program of cross-national collaboration running annual surveys on topics important for the social sciences.

From Andrew Gelman and co-authors..

Published for the Supreme Court Historical Society, the journal and the society are dedicated to the collection and preservation of the history of the Supreme Court..

A premier journal in the field of public administration research, theory, and practice..

Advancing the goals of creating secure and sustaining conditions in migrant sending communities; promoting safe, legal migration options; and developing immigration and integration policies that benefit sending and receiving communities and allow newcomers to lead productive, secure lives..

One of the most authoritative journals covering politics, government and public policy in Western Europe..