=== Indledende heat ===
<ref>{{Cite web|title=Women's 200m Backstroke – Heats|url=http://www.london2012.com/swimming/event/women-200m-backstroke/phase=sww042900/index.html|accessdate=27. juli 2012|archiveurl=https://archive.today/20121210182533/http://www.london2012.com/swimming/event/women-200m-backstroke/phase=sww042900/index.html|archivedate=10. december 2012|url-status=live}}</ref>
{| class="wikitable sortable" style="text-align:center"
|-
! Placering !! Heat !! Bane !! Svømmer !! Nationalitet!! Tid !! Kommentarer
|-bgcolor=ccffcc
| 1 || 5 || 4 || align=left|[[Missy Franklin]] || align=left|{{flag|USA|2012|Sommer}} || {{sort|2:07.54|2.07,54}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 2 || 3 || 5 || align=left|[[Elizabeth Beisel]] || align=left|{{flag|USA|2012|Sommer}} || {{sort|2:07.82|2.07,82}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 3 || 5 || 2 || align=left|[[Kirsty Coventry]] || align=left|{{flag|ZIM|2012|Sommer}} || {{sort|2:08.14|2.08,14}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 4 || 5 || 5 || align=left|[[Meagen Nay]] || align=left|{{flag|AUS|2012|Sommer}} || {{sort|2:08.40|2.08,40}}|| [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 5 || 4 || 4 || align=left|[[Belinda Hocking]] || align=left|{{flag|AUS|2012|Sommer}} || {{sort|2:08.75|2.08,75}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 6 || 3 || 6 || align=left|[[Alexianne Castel]] || align=left|{{flag|FRA|2012|Sommer}} || {{sort|2:08.92|2.08,92}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 7 || 3 || 3 || align=left|[[Sinead Russell]] || align=left|{{flag|CAN|2012|Sommer}} || {{sort|2:09.04|2.09,04}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 8 || 3 || 4 || align=left|[[Anastasia Zueva]] || align=left|{{flag|RUS|2012|Sommer}} || {{sort|2:09.36|2.09,36}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 9 || 4 || 3 || align=left|[[Daryna Zevina]] || align=left|{{flag|UKR|2012|Sommer}} || {{sort|2:09.40|2.09,40}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 10 || 4 || 7 || align=left|[[Duane da Rocha]] || align=left|{{flag|ESP|2012|Sommer}} || {{sort|2:09.72|2.09,72}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 11 || 5 || 7 || align=left|[[Stephanie Proud]] || align=left|{{flag|GBR|2012|Sommer}} || {{sort|2:10.01|2.10,01}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 12 || 2 || 6 || align=left|[[Simona Baumrtová]] || align=left|{{flag|CZE|2012|Sommer}} || {{sort|2:10.03|2.10,03}} || [[#Semifinaler|Kvalificeret til semifinale]], '''NR'''
|-bgcolor=ccffcc
| 13 || 3 || 1 || align=left|[[Karin Prinsloo]] || align=left|{{flag|RSA|2012|Sommer}} || {{sort|2:10.34|2.10,34}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 14 || 4 || 5 || align=left|[[Elizabeth Simmonds]] || align=left|{{flag|GBR|2012|Sommer}} || {{sort|2:10.37|2.10,37}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 15 || 4 || 6 || align=left|[[Jenny Mensing]] || align=left|{{flag|GER|2012|Sommer}} || {{sort|2:10.54|2.10,54}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-bgcolor=ccffcc
| 16 || 5 || 3 || align=left|[[Sharon van Rouwendaal]] || align=left|{{flag|NED|2012|Sommer}} || {{sort|2:10.60|2.10,60}} || [[#Semifinaler|Kvalificeret til semifinale]]
|-
| 17 || 4 || 1 || align=left|[[Melissa Ingram]] || align=left|{{flag|NZL|2012|Sommer}} || {{sort|2:10.63|2.10,63}} ||
|-
| 18 || 4 || 2 || align=left|[[Hilary Caldwell]] || align=left|{{flag|CAN|2012|Sommer}} || {{sort|2:10.75|2.10,75}} ||
|-
| 19 || 3 || 7 || align=left|[[Bai Anqi]] || align=left|{{flag|CHN|2012|Sommer}} || {{sort|2:11.26|2.11,26}} ||
|-
| 20 || 5 || 8 || align=left|[[Eyglo Osk Gustafsdottir]] || align=left|{{flag|ISL|2012|Sommer}} || {{sort|2:11.31|2.11,31}} ||
|-
| 21 || 2 || 4 || align=left|[[Miyu Otsuka]] || align=left|{{flag|JPN|2012|Sommer}} || {{sort|2:11.65|2.11,65}} ||
|-
| 22 || 5 || 1 || align=left|[[Yao Yige]] || align=left|{{flag|CHN|2012|Sommer}} || {{sort|2:12.14|2.12,14}} ||
|-
| 23 || 3 || 2 || align=left|[[Alessia Filippi]] || align=left|{{flag|ITA|2012|Sommer}} || {{sort|2:12.40|2.12,40}} ||
|-
| 24 || 2 || 5 || align=left|[[Maria Fernanda Gonzalez]] || align=left|{{flag|MEX|2012|Sommer}} || {{sort|2:12.75|2.12,75}} ||
|-
| 25 || 2 || 7 || align=left|[[Anja Carman]] || align=left|{{flag|SLO|2012|Sommer}} || {{sort|2:13.01|2.13,01}} ||
|-
| 26 || 1 || 4 || align=left|[[Nguyen Thi Anh Vien]] || align=left|{{flag|VIE|2012|Sommer}} || {{sort|2:13.35|2.13,35}} ||
|-
| 27 || 1 || 6 || align=left|[[Carolina Colorado]] || align=left|{{flag|COL|2012|Sommer}} || {{sort|2:13.64|2.13,64}} ||
|-
| 28 || 2 || 2 || align=left|[[Mie Nielsen]] || align=left|{{flag|DEN|2012|Sommer}} || {{sort|2:13.89|2.13,89}} ||
|-
| 29 || 3 || 8 || align=left|[[Alicja Tchorz]] || align=left|{{flag|POL|2012|Sommer}} || {{sort|2:14.02|2.14,02}} ||
|-
| 30 || 5 || 6 || align=left|[[Laure Manaudou]] || align=left|{{flag|FRA|2012|Sommer}} || {{sort|2:14.29|2.14,29}} ||
|-
| 31 || 1 || 2 || align=left|[[Ham Chan-Mi]] || align=left|{{flag|KOR|2012|Sommer}} || {{sort|2:15.30|2.15,30}} ||
|-
| 32 || 4 || 8 || align=left|[[Ekaterina Avramova]] || align=left|{{flag|BUL|2012|Sommer}} || {{sort|2:15.44|2.15,44}} ||
|-
| 33 || 2 || 1 || align=left|[[Kim Daniela Pavlin]] || align=left|{{flag|CRO|2012|Sommer}} || {{sort|2:15.67|2.15,67}} ||
|-
| 34 || 2 || 3 || align=left|[[Melanie Nocher]] || align=left|{{flag|IRL|2012|Sommer}} || {{sort|2:16.29|2.16,29}} ||
|-
| 35 || 1 || 3 || align=left|[[Dorina Szekeres]] || align=left|{{flag|HUN|2012|Sommer}} || {{sort|2:18.16|2.18,16}} ||
|-
| 36 || 2 || 8 || align=left|[[Hoishun Stephanie Au]] || align=left|{{flag|HKG|2012|Sommer}} || {{sort|2:18.47|2.18,47}} ||
|-
| 37 || 1 || 5 || align=left|[[Yulduz Kuchkarova]] || align=left|{{flag|UZB|2012|Sommer}} || {{sort|2:18.60|2.18,60}} ||
|}
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