Leip's Atlas provides election data for all presidential elections back to 1789. Senatorial and Gubernatorial data is also available, but the dates vary.
Since 1920, the Clerk of the House has collected and published the official vote counts for federal elections from the official sources among the various states and territories.
From the U.S. Census Bureau. This is a good source for voting information by such categories as race, gender, and age groups. Coverage is roughly from 1964 to the present.
Call Number: REF JK271 .B343 and 3rd level JK271 .B343
The Almanac provides statistical and geographical information on Congressional Districts. Use the older editions of the Almanacs for historical district information.
The Historical Atlas of United States Congressional Districts, 1789-1983 by Kenneth C. Martis