Roll call voting records for the United States House of Representatives and the Senate are listed from the 1st Congress until now. The website is a bit tricky to use. You must scroll down until you get to the Roll Call Data Section. When a Congress is clicked on, the format of the files comes up, explaining how to use the site. Scroll down a bit and the Congress Roll Call information comes up. The information is being compiled by a former University of California, San Diego professor, Keith Poole.