| 
 | 
| Event Name | Event-Round# | 
|---|---|
| Women 400 M | 23-1 | 
| Record | Athlete/Team | Time | Date | 
|---|---|---|---|
| American | Sanya Richards - US World Cup Team | 48.70 | 9/17/2006 | 
| College Best | Monique Henderson - UCLA | 50.10 | 6/11/2005 | 
| NCAA Meet | Monique Henderson - UCLA | 50.10 | 6/11/2005 | 
| Place | Athlete | Affiliation | Time | Wind | Heat (Pl) | Result (split) | |
|---|---|---|---|---|---|---|---|
| 1 | Shaunae Miller | UGA | 51.57 (51.561) | Q | 1 (1) | Heat data | |
| 2 | Regina George | ARK | 51.57 (51.565) | Q | 3 (1) | Heat data | |
| 3 | Ashley Spencer | ILL | 51.61 | Q | 2 (1) | Heat data | |
| 4 | Phyllis Francis | UO | 51.83 | Q | 2 (2) | Heat data | |
| 5 | Lenora Guion-Firmin | UMES | 52.03 | Q | 1 (2) | Heat data | |
| 6 | Courtney Okolo | TEX | 52.05 | q | 2 (3) | Heat data | |
| 7 | Jody-Ann Muir | MSST | 52.12 | Q | 3 (2) | Heat data | |
| 8 | Erika Rucker | SCAR | 52.25 | q | 3 (3) | Heat data | |
| 9 | Briana Nelson | TEX | 52.31 | 3 (4) | Heat data | ||
| 10 | Diamond Dixon | KU | 52.38 | 1 (3) | Heat data | ||
| 11 | Ebony Eutsey | UFL | 52.52 | 1 (4) | Heat data | ||
| 12 | Chizoba Okodogbe | UO | 52.57 | 3 (5) | Heat data | ||
| 13 | Shawna Fermin | WAST | 52.76 | 3 (6) | Heat data | ||
| 14 | Michelle Brown | ND | 53.03 | 3 (7) | Heat data | ||
| 15 | Felicia Brown | TENN | 53.05 | 3 (8) | Heat data | ||
| 16 | Kala Funderburk | MEMP | 53.14 | 2 (4) | Heat data | ||
| 17 | Kiara Porter | VCU | 53.17 | 2 (5) | Heat data | ||
| 18 | Margaret Bamgbose | ND | 53.38 | 1 (5) | Heat data | ||
| 19 | Molly Ellis | SJON | 53.46 | 1 (6) | Heat data | ||
| 20 | Jennifer Carey | UCSB | 53.65 | 1 (7) | Heat data | ||
| 21 | Sade Sealy | ILST | 53.76 | 2 (6) | Heat data | ||
| 22 | Christen Rivers | TXT | 53.82 | 2 (7) | Heat data | ||
| 23 | Natalie Stewart | BYU | 53.84 | 1 (8) | Heat data | ||
| Lanie Whittaker | UFL | DNF | 2 | Heat data | 
