The following chart presents market-by-market Nielsen ratings for each race in the '04 Visa Triple Crown, including the Kentucky Derby, Preakness Stakes and Belmont Stakes. Louisville, KY averaged a 27.0/49 rating for the three races, the highest of any market. Baltimore (19.0/38) was second-highest and Philadelphia (19.0/35) third. The markets listed are the designated market areas, ranked by number of TV households (Nielsen).
| '04 VISA TRIPLE CROWN MARKET-BY-MARKET RATINGS |
| MARKET ^ | KENTUCKY DERBY | PREAKNESS STAKES | BELMONT STAKES |
| Albuquerque-Santa Fe (49) | 7.3/19 | 6.6/15 | 10.6/21 |
| Atlanta (9) | 8.8/17 | 7.4/15 | 13.9/26 |
| Austin (54) | 9.4/18 | 6.8/15 | 13.5/29 |
| Baltimore (23) | 11.7/27 | 21.1/44 | 24.1/42 |
| Birmingham (40) | 6.9/12 | 5.5/11 | 9.0/18 |
| Boston (6) | 10.2/26 | 9.9/25 | 14.4/33 |
| Buffalo (44) | 13.0/26 | 10.9/20 | 17.9/34 |
| Charlotte (28) | 7.5/16 | 8.0/17 | 10.3/23 |
| Chicago (3) | 9.6/19 | 7.4/18 | 11.3/25 |
| Cincinnati (32) | 20.0/41 | 14.6/29 | 16.2/36 |
| Cleveland (16) | 12.2/26 | 12.4/25 | 14.2/29 |
| Columbus, OH (34) | 12.9/28 | 12.2/23 | 13.9/29 |
| Dallas-Ft. Worth (7) | 8.6/17 | 4.5/10 | 13.6/26 |
| Dayton, OH (59) | 12.1/23 | 10.1/19 | 12.7/27 |
| Denver (18) | 7.6/18 | 6.4/18 | 14.1/31 |
| Detroit (10) | 13.6/25 | 9.8/18 | 14.9/33 |
| Ft. Myers-Naples, FL (70) | 15.8/30 | 15.6/29 | 21.1/38 |
| Greensboro (46) | 8.0/15 | 6.8/15 | 13.1/25 |
| Greenville (35) | 10.1/17 | 7.4/15 | 13.6/25 |
| Hartford-New Haven, CT (27) | 11.4/25 | 9.0/23 | 18.6/37 |
| Houston (11) | 9.0/15 | 6.5/13 | 15.0/27 |
| Indianapolis (25) | 12.3/25 | 9.7/20 | 11.7/27 |
| Jacksonville (52) | 13.8/23 | 10.8/19 | 17.0/29 |
| Kansas City (31) | 7.4/16 | 5.6/13 | 14.1/26 |
| Knoxville, TN (61) | 12.6/25 | 14.2/27 | 18.2/33 |
| Las Vegas (51) | 8.9/20 | 10.5/22 | 15.3/29 |
| Los Angeles (2) | 6.9/17 | 5.4/12 | 11.7/27 |
| Louisville, KY (50) | 39.9/67 | 16.9/34 | 24.3/47 |
| Memphis (43) | 8.6/14 | 8.3/14 | 12.3/21 |
| Miami (17) | 6.8/14 | 6.1/12 | 12.3/22 |
| Milwaukee (33) | 9.5/21 | 7.7/18 | 13.2/31 |
| Minneapolis-St. Paul (14) | 7.5/19 | 7.5/19 | 11.3/29 |
| Nashville (30) | 12.1/25 | 10.9/22 | 16.8/33 |
| New Orleans (42) | 10.0/18 | 7.9/13 | 16.4/27 |
| New York (1) | 10.7/24 | 11.2/24 | 20.7/37 |
| Norfolk, VA (41) | 10.4/19 | 8.7/17 | 14.7/26 |
| Oklahoma City (45) | 14.9/28 | 11.6/27 | 20.6/38 |
| Orlando (20) | 11.7/24 | 12.0/23 | 20.1/37 |
| Philadelphia (4) | 12.1/26 | 16.9/34 | 28.1/46 |
| Phoenix (15) | 6.7/15 | 6.5/14 | 13.6/27 |
| Pittsburgh (22) | 13.5/29 | 12.1/23 | 19.9/36 |
| Portland (24) | 5.5/16 | 9.0/22 | 13.7/31 |
| Providence, RI (48) | 9.7/21 | 10.0/24 | 13.5/26 |
| Raleigh-Durham (29) | 7.5/14 | 5.5/12 | 13.0/25 |
| Richmond, VA (58) | 10.3/20 | 7.2/16 | 16.9/30 |
| Sacramento (19) | 6.3/15 | 7.2/17 | 10.6/22 |
| Salt Lake City (36) | 4.9/16 | 5.5/17 | 12.6/33 |
| San Antonio (37) | 10.1/19 | 7.1/14 | 16.0/31 |
| San Diego (26) | 7.3/18 | 7.4/20 | 12.0/26 |
| San Francisco-Oakland (5) | 6.1/16 | 6.4/17 | 13.9/35 |
| Seattle (12) | 6.5/21 | 6.2/16 | 9.9/22 |
| St. Louis (21) | 13.4/28 | 10.7/24 | 17.9/35 |
| Tampa (13) | 13.9/26 | 12.0/22 | 19.3/34 |
| Tulsa (60) | 11.6/21 | 8.4/16 | 13.2/25 |
| Washington, D.C. (8) | 13.4/26 | 11.0/23 | 18.0/32 |
| West Palm Beach, FL (39) | 12.7/27 | 14.3/26 | 23.1/40 |
|
| 56-METERED MARKET AVG. | 10.1/22 | 9.2/20 | 15.6/31 |
