== Indledende heat ==
* 81 udøver per 27. juli.<ref>[http://www.iaaf.org/mm/Document/06/61/86/66186_PDF_English.pdf Entry List by Event]. IAAF (2012-07-27). hentet 29. juli 2012.</ref>
{| class="wikitable sortable" style="text-align:center"
!Placering !! Heat !! Udøver !! Nation !! Tid !! Kommentarer
|-bgcolor=#ccffcc
| 1 || 2 ||align=left| [[Carmelita Jeter]] ||align=left| {{flagIOC|USA|sommer-OL 2012}} || 10.83 || Q
|-bgcolor=#ccffcc
| 2 || 4 ||align=left| [[Blessing Okagbare]] ||align=left| {{flagIOC|NGR|sommer-OL 2012}} || 10.93 || Q, PB
|-bgcolor=#ccffcc
| 3 || 3 ||align=left| [[Veronica Campbell-Brown]] ||align=left| {{flagIOC|JAM|sommer-OL 2012}} || 10.94 || Q
|-bgcolor=#ccffcc
| 4 || 1 ||align=left| [[Kelly-Ann Baptiste]] ||align=left| {{flagIOC|TRI|sommer-OL 2012}} || 10.96 || Q
|-bgcolor=#ccffcc
| 5 || 4 ||align=left| [[Tianna Madison]] ||align=left| {{flagIOC|USA|sommer-OL 2012}} || 10.97 || Q
|-bgcolor=#ccffcc
| 6 || 7 ||align=left| [[Murielle Ahouré]] ||align=left| {{flagIOC|CIV|sommer-OL 2012}} || 10.99 || Q, '''NR'''
|-bgcolor=#ccffcc
| 7 || 6 ||align=left| [[Shelly-Ann Fraser-Pryce]] ||align=left| {{flagIOC|JAM|sommer-OL 2012}} || 11.00 || Q
|-bgcolor=#ccffcc
| 8 || 5 ||align=left| [[Allyson Felix]] ||align=left| {{flagIOC|USA|sommer-OL 2012}} || 11.01 || Q
|-bgcolor=#ccffcc
| 9 || 6 ||align=left| [[Semoy Hackett]] ||align=left| {{flagIOC|TRI|sommer-OL 2012}} || 11.04 || Q, =PB
|-bgcolor=#ccffcc
| 10 || 3 ||align=left| [[Ivet Lalova]] ||align=left| {{flagIOC|BUL|sommer-OL 2012}} || 11.06 || Q, =SB
|-bgcolor=#ccffcc
| 11 || 1 ||align=left| [[Myriam Soumaré]] ||align=left| {{flagIOC|FRA|sommer-OL 2012}} || 11.07 || Q, PB
|-bgcolor=#ccffcc
| 11 || 7 ||align=left| [[Laverne Jones-Ferrette]] ||align=left| {{flagIOC|ISV|sommer-OL 2012}} || 11.07 || Q, '''NR'''
|-bgcolor=#ccffcc
| 11 || 5 ||align=left| [[Rosângela Santos]] ||align=left| {{flagIOC|BRA|sommer-OL 2012}} || 11.07 || Q
|-bgcolor=#ccffcc
| 14 || 7 ||align=left| [[Kerron Stewart]] ||align=left| {{flagIOC|JAM|sommer-OL 2012}} || 11.08 || Q
|-bgcolor=#ccffcc
| 15 || 1 ||align=left| [[Verena Sailer]] ||align=left| {{flagIOC|GER|sommer-OL 2012}} || 11.12 || Q
|-bgcolor=#ccffcc
| 16 || 3 ||align=left| [[Gloria Asumnu]] ||align=left| {{flagIOC|NGR|sommer-OL 2012}} || 11.13 || Q, =SB
|-bgcolor=#ddffdd
| 17 || 1 ||align=left| [[Ezinne Okparaebo]] ||align=left| {{flagIOC|NOR|sommer-OL 2012}} || 11.14 || q, '''[[Norske rekorder i atletik|Norsk rekord]]'''
|-bgcolor=#ccffcc
| 17 || 5 ||align=left| [[Ruddy Zang Milama]] ||align=left| {{flagIOC|GAB|sommer-OL 2012}} || 11.14 || Q
|-bgcolor=#ccffcc
| 19 || 6 ||align=left| [[Olesya Povh]] ||align=left| {{flagIOC|UKR|sommer-OL 2012}} || 11.18 || Q
|-bgcolor=#ddffdd
| 20 || 3 ||align=left| [[Lina Grinčikaitė]] ||align=left| {{flagIOC|LTU|sommer-OL 2012}} || 11.19 || q, '''NR'''
|-bgcolor=#ddffdd
| 21 || 3 ||align=left| [[Abiodun Oyepitan]] ||align=left| {{flagIOC|GBR|sommer-OL 2012}} || 11.22 || q
|-
| 21 || 6 ||align=left| [[Guzel Khubbieva]] ||align=left| {{flagIOC|UZB|sommer-OL 2012}} || 11.22 || SB
|-
| 23 || 5 ||align=left| [[Toea Wisil]] ||align=left| {{flagIOC|PNG|sommer-OL 2012}} || 11.27 || 
|-bgcolor=#ccffcc
| 24 || 4 ||align=left| [[Michelle-Lee Ahye]] ||align=left| {{flagIOC|TRI|sommer-OL 2012}} || 11.28 || Q
|-bgcolor=#ccffcc
| 25 || 2 ||align=left| [[Olga Bludova]] ||align=left| {{flagIOC|KAZ|sommer-OL 2012}} || 11.31 || Q
|-
| 26 || 6 ||align=left| [[Debbie Ferguson-McKenzie]] ||align=left| {{flagIOC|BAH|sommer-OL 2012}} || 11.32 || 
|-
| 37 || 6 ||align=left| [[Melissa Breen]] ||align=left| {{flagIOC|AUS|sommer-OL 2012}} || 11.34 ||
|-bgcolor=#ccffcc
| 28 || 2 ||align=left| [[Sheniqua Ferguson]] ||align=left| {{flagIOC|BAH|sommer-OL 2012}} || 11.35 || Q
|-
| 29 || 7 ||align=left| [[Oludamola Osayomi]] ||align=left| {{flagIOC|NGR|sommer-OL 2012}} || 11.36 ||
|-
| 30 || 2 ||align=left| [[Olga Belkina]] ||align=left| {{flagIOC|RUS|sommer-OL 2012}} || 11.38 ||
|-
| 31 || 4 ||align=left| [[Tatjana Pinto]] ||align=left| {{flagIOC|GER|sommer-OL 2012}} || 11.39 ||
|-
| 32 || 2 ||align=left| [[Anyika Onuora]] ||align=left| {{flagIOC|GBR|sommer-OL 2012}} || 11.41 ||
|-
| 32 || 5 ||align=left| [[Allison Peter]] ||align=left| {{flagIOC|ISV|sommer-OL 2012}} || 11.41 ||
|-
| 32 || 5 ||align=left| [[Véronique Mang]] ||align=left| {{flagIOC|FRA|sommer-OL 2012}} || 11.41 ||
|-
| 32 || 5 ||align=left| [[Chisato Fukushima]] ||align=left| {{flagIOC|JPN|sommer-OL 2012}} || 11.41 ||
|-
| 36 || 2 ||align=left| [[Marta Jeschke]] ||align=left| {{flagIOC|POL|sommer-OL 2012}} || 11.42 || =SB
|-
| 37 || 1 ||align=left| [[Kateřina Čechová]] ||align=left| {{flagIOC|CZE|sommer-OL 2012}} || 11.43 ||
|-
| 38 || 4 ||align=left| [[Andreea Ogrăzeanu]] ||align=left| {{flagIOC|ROU|sommer-OL 2012}} || 11.44 ||
|-
| 39 || 7 ||align=left| [[Nataliya Pohrebnyak]] ||align=left| {{flagIOC|UKR|sommer-OL 2012}} || 11.46 ||
|-
| 40 || 6 ||align=left| [[Wei Yongli]] ||align=left| {{flagIOC|CHN|sommer-OL 2012}} || 11.48 ||
|-
| 41 || 1 ||align=left| [[Kerri-Ann Mitchell]] ||align=left| {{flagIOC|CAN|sommer-OL 2012}} || 11.49 ||
|-
| 42 || 3 ||align=left| [[Phobay Kutu-Akoi]] ||align=left| {{flagIOC|LBR|sommer-OL 2012}} || 11.52 ||
|-
| 43 || 3 ||align=left| [[Yomara Hinestroza]] ||align=left| {{flagIOC|COL|sommer-OL 2012}} || 11.56 || SB
|-
| 44 || 1 ||align=left| [[Tahesia Harrigan-Scott]] ||align=left| {{flagIOC|IVB|sommer-OL 2012}} || 11.59 || SB
|-
| 45 || 4 ||align=left| [[Nimet Karakus]] ||align=left| {{flagIOC|TUR|sommer-OL 2012}} || 11.62 ||
|-
| 46 || 7 ||align=left| [[Maria Belibasaki]] ||align=left| {{flagIOC|GRE|sommer-OL 2012}} || 11.63 ||
|-
| 47 || 2 ||align=left| [[Yuliya Balykina]] ||align=left| {{flagIOC|BLR|sommer-OL 2012}} || 11.70 ||
|-
| 48 || 5 ||align=left| [[Dana Abdul Razak]] ||align=left| {{flagIOC|IRQ|sommer-OL 2012}} || 11.81 ||
|-
| 49 || 7 ||align=left| [[Delphine Atangana]] ||align=left| {{flagIOC|CMR|sommer-OL 2012}} || 11.82 ||
|-
| 50 || 4 ||align=left| [[Feta Ahamada]] ||align=left| {{flagIOC|COM|sommer-OL 2012}} || 11.86 ||
|-
| 51 || 7 ||align=left| [[Kaina Martinez]] ||align=left| {{flagIOC|BIZ|sommer-OL 2012}} || 11.89 ||
|-
| 52 || 4 ||align=left| [[Lorene Bazolo]] ||align=left| {{flagIOC|CGO|sommer-OL 2012}} || 11.90 ||
|-
| 53 || 2 ||align=left| [[Diane Borg]] ||align=left| {{flagIOC|MLT|sommer-OL 2012}} || 11.92 || SB
|-
| 54 || 1 ||align=left| [[Fong Yee Pui]] ||align=left| {{flagIOC|HKG|sommer-OL 2012}} || 11.98 ||
|-
| 55 || 3 ||align=left| [[Saruba Colley]] ||align=left| {{flagIOC|GAM|sommer-OL 2012}} || 12.06 || '''NR'''
|-
| 56 || 6 ||align=left| [[Bamab Napo]] ||align=left| {{flagIOC|TOG|sommer-OL 2012}} || 12.35 ||
|}
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