Nielsen//NetRatings listed top advertisers on sports sites by banner impression in April 2005. The data from the week ending on April 24, 2005, was used for the survey.
- PGA TOUR, Inc.
- FIFA
- NBA
- The University of Tennessee
- University of Nebraska
- Iowa Hawkeyes
- International Speedway Corporation
- Mavericks Surf Ventures
- University of North Carolina
- Arizona Cardinals
- Arizona State University System
- NCAA
- Oregon State University Beavers
- South Carolina Gamecocks
- Kansas Jayhawks
- Major League Baseball
- PGA of America
- USC Trojans
- Cablevision Systems Corporation
- University of Baylor Bears