The Federal Election Commission (FEC). The FEC is the official source of federal campaign finance data. Information on donations to and from candidate committees, official political action committees (PACs), individual donations, soft money contributions, and political party committees is available through the FEC web site and the Washington DC office.

Common Cause is an independent non-profit advocacy organization focusing on campaign finance reform and other issues that enhance citizens' participation in democracy.

The Center for Responsive Politics is a non-partisan, non-profit research group that tracks money in politics and its impact on elections and public policy. The website allows for searches by industry, candidate, contributor and political party.

National Institute on Money in State Politics maintains a database of state level campaign finance data. States are searchable by candidate or special interest, including tobacco companies. The Institute also produces industry-specific reports. In May 2005, the Institute released a report on tobacco industry contributions to state candidates. In April 2006, the Institute released a report on industry spending on tobacco tax ballot initiatives.

The Center for Public Integrity maintains a database of contributions to and expenditures by 527 committees. Their database also includes state-level information.

The Center for Public Integrity also tracks state-level lobbying. In an August 2005 report, the Center gathered overall, aggregate spending totals available in each state.

The University of California - San Francisco web site contains state reports on tobacco industry political activity that provide an in-depth look at the tobacco industry's political activities and the influence on state level policies.