The Campaign Finance Institute (CFI) is a 501(c)(3) nonprofit organization located in Washington, D.C. It is a nonpartisan think tank that conducts peer-reviewed research on campaign finance in the United States.

Founded in 1999, CFI has successfully established its reputation as the nation’s pre-eminent think tank for campaign finance policy. Written to meet peer-reviewed standards, CFI’s original work is published in academic journals as well as in forms regularly used by the media and policy makers. CFI’s tools are made available freely to stimulate new research by others, while its bibliographies bring the results of recent scholarship to the attention of the policy community.

CFI's regularly published analyses of federal campaign finance are built on the idea that to identify new developments, you have to look at consistent data over time, to compare what is, with what was. They invite you to review historical data under these various headings. 

A number of the tables below (noted with an *) are versions of those that are part of Vital Statistics on Congress, a joint effort of the Brookings Institution and the American Enterprise Institute, co-authored by Norman J. Ornstein, Thomas E. Mann, Michael J. Malbin, Andrew Rugg and Raffaela Wakeman.