Research Services

Over the past 39 years, Election Data Services has monitored developments in redistricting and election administration, and has conducted studies on voting equipment and congressional reapportionment. The firm has also been contracted by federal, state, and local election organizations to conduct studies on voting issues.

Redistricting Related

Ideal District size chart, by state

• Current
• Historical

Reapportionment of Congress

• Historical Table back to 1789
• Decennial Calculations – 1940 – 2010
• Current (2020 Estimates Study)
  • Historical
  • 2018 Study

Election Returns, County Level data back to 1980 

Election Administration Related

Nationwide

• Basic Election Administration Facts Powerpoint
• Voting Equipment
  • Link to current database
  • Historical studies
  • Historical maps
    • Individual years
    • Banner Map – 1980 – 2012
• Voter Registration Studies
• Testimony before Pence/Kobach Presidential Advisory Commission
• Election Administration Commission bi-annual Studies
  • 2004 in depth report
  • 2006 Report
  • Link to EAC for subsequent Reports
  • Historical dataset merger

Prince William County

• Analysis of 2014 Election
• Long Lines in 2012 Study Analysis
• Hourly Precinct Participation Studies