The 2015 Phillips 66 National Swimming Championships were held from August 6 to 10, 2015, at the Northside Swim Center in San Antonio, Texas.[1] [2]
| 50 m freestyle | Caeleb Dressel | 21.53 | Cullen Jones | 21.87 | Josh Schneider | 21.92 | |
| 100 m freestyle | Caeleb Dressel | 48.78 | Jack Conger | 49.05 | William Copeland | 49.09 | |
| 200 m freestyle | Maxime Rooney | 1:47.10 | Zane Grothe | 1:47.11 | Blake Pieroni | 1:47.30 | |
| 400 m freestyle | Zane Grothe | 3:45.98 | Clark Smith | 3:47.10 | Townley Haas | 3:48.69 | |
| 1500 m freestyle | Jordan Wilimovsky | 14:57.05 | True Sweetser | 15:10.73 | PJ Ransford | 15:14.04 | |
| 100 m backstroke | Junya Koga | 53.20 | Nick Thoman | 53.23 | Luke Kaliszak | 54.23 | |
| 200 m backstroke | Jacob Pebley | 1:56.66 | Michael Taylor | 1:58.10 | Carter Griffin | 1:58.38 | |
| 100 m breaststroke | Andrew Wilson | 59.65 | Craig Benson | 1:00.13 | Brad Craig | 1:00.63 | |
| 200 m breaststroke | Craig Benson | 2:09.68 | Will Licon | 2:10.02 | Andrew Wilson | 2:10.35 | |
| 100 m butterfly | Michael Phelps | 50.45 | Jack Conger | 51.33 | David Nolan | 52.15 | |
| 200 m butterfly | Michael Phelps | 1:52.94 | Jack Conger | 1:54.54 | Pace Clark | 1:56.84 | |
| 200 m IM | Michael Phelps | 1:54.75 | Will Licon | 1:58.43 | Travis Mahoney | 1:59.41 | |
| 400 m IM | Gunnar Bentz | 4:14.16 | Travis Mahoney | 4:17.00 | Sean Grieshop | 4:17.02 |
| 50 m freestyle | Madison Kennedy | 24.71 | Amanda Weir | 24.85 | Kelsi Dahlia | 25.01 | |
| 100 m freestyle | Amanda Weir | 54.24 | Allison Schmitt | 54.34 | Madison Kennedy | 55.02 | |
| 200 m freestyle | Allison Schmitt | 1:56.91 | Hali Flickinger | 1:58.18 | Katie Drabot | 1:58.58 | |
| 400 m freestyle | Lindsay Vrooman | 4:07.88 | Hali Flickinger | 4:07.93 | Courtney Harnish | 4:08.22 | |
| 800 m freestyle | Lindsay Vrooman | 8:28.13 | Stephanie Peacock | 8:28.25 | Sarah Henry | 8:29.45 | |
| 100 m backstroke | Claire Adams | 59.58 | Georgia Davies | 59.93 | Ali DeLoof | 1:00.36 | |
| 200 m backstroke | Claire Adams | 2:09.44 | Danielle Galyer | 2:09.75 | Hali Flickinger | 2:10.60 | |
| 100 m breaststroke | Katie Meili | 1:06.55 | Lilly King | 1:06.69 | Laura Sogar | 1:07.41 | |
| 200 m breaststroke | Laura Sogar | 2:23.54 | Molly Hannis | 2:25.57 | Emma Schoettmer | 2:26.41 | |
| 100 m butterfly | Kelsi Dahlia | 57.27 | Felicia Lee | 58.54 | Christina Bechtel | 58.74 | |
| 200 m butterfly | Hali Flickinger | 2:07.59 | Cassidy Bayer | 2:08.03 | Christina Bechtel | 2:09.20 | |
| 200 m IM | Caitlin Leverenz | 2:10.70 | Madisyn Cox | 2:10.75 | Bethany Galat | 2:12.13 | |
| 400 m IM | Caitlin Leverenz | 4:38.81 | Sarah Henry | 4:41.53 | Madisyn Cox | 4:41.75 |