| 1 | Danuta Bartoszek | 2:31:46.0 | 1995 | Chicago, USA |
| 2 | Laura Portis | 2:33:48.0 | 2013 | Minneapolis, USA |
| 3 | May Allison | 2:34:55.0 | 1994 | Detroit, USA |
| 4 | Gayle Olenek(ova) | 2:35:12.0 | 1979 | New Orleans, USA. Tail wind |
| 5 | Lucy Njeri | 2:37:12.2 | 2012 | Toronto, Scotiabank |
| 6 | Kim Webb | 2:37:58.0 | 2000 | |
| 7 | Laura Konantz | 2:39:57.0 | 1990 | Los Angeles, USA |
| 8 | Dorothy Goertzen | 2:40:59.0 | 1986 | Chicago but EH claims 2:35:24 (1984) |
| 9 | Angela Strange | 2:43:22.0 | 2002 | Detroit, USA |
| 10 | Maureen Griffith | 2:43:25.0 | 1986 | Seoul, Korea |
| 11 | Elaine Coburn | 2:44:18.0 | 2001 | Ottawa |
| 12 | Laura Lynn | 2:44:33.0 | 1991 | Toronto |
| 13 | Liza Howard | 2:45:23.0 | 2018 | Toronto, Scotiabank |
| 14 | Lois Medal | 2:47:54.0 | 1994 | Toronto |
| 15 | Kathy Needham-Ballinger | 2:48:00.0 | 1995 | |
| 16 | Dehininet Jara | 2:48:50.0 | 2017 | Toronto, Scotiabank |
| 17 | Pauline Watson | 2:49:00.0 | 1986 | Alabama, USA |
| 18 | Melissa Putt | 2:49:12.0 | 1992 | |
| 19 | Elizabeth Primrose | 2:50:07.0 | 1983 | |
| 20 | Laurie Walsh | 2:52:56.0 | 1996 | Las Vegas, USA. |
| 21 | Jennifer Cooper | 2:53:13.0 | 2001 | |
| 22 | Rachel Sinasac-Kalaousis | 2:55:16.3 | 2014 | Toronto, Goodlife (d) |
| 23 | Laura McIntyre | 2:55:38.0 | 2006 | Boston, USA (d) |
| 24 | Sharon Crawford | 2:56:10.0 | 1983 | Toronto |
| 25 | Allison MacKenzie | 2:57:25.6 | 2004 | Ottawa |
| 26 | Carol Sunohara-Bedley | 2:59:21.0 | 2018 | Chicago, USA |
| 27 | Rebecca Patten | 2:59:46.0 | 2014 | |
| 28 | Tammy Purdy | 3:00:14.0 | 1996 | Columbus, Ohio |
| 29 | Gina Wong | 3:01:07.0 | 2015 | |
| 30 | Clemence Vauzelle | 3:02:17.4 | 2018 | Mississauga (d) |
| 31 | Avril Lewis | 3:02:30.0 | 1984 | Ottawa |
| 32 | Leticia Reid | 3:04:25.0 | 1981 | |
| 33 | Jennifer Knowles | 3:05:20.0 | 1985 | London, England |
| 34 | Alison Evanoff | 3:05:25.0 | | |
| 35 | Claudia Arevado | 3:08:25.0 | 1997 | Detroit, USA |
| 36 | Kathy Sullivan-Westgate | 3:10:30.0 | 1985 | |
| 37 | Nikki Gabrielli-Butters | 3:11:21.8 | 2013 | |
| 38 | Jennifer Biewald | 3:12:36.1 | 2016 | Ottawa |
| 39 | Olivia Cimo | 3:14:30.0 | 2011 | Toronto, Scotiabank |
| 40 | Chris Marino | 3:16:30.0 | 1980 | Detroit, USA |
| 41 | Eva Poxon | 3:16:40.0 | 1983 | |
| 42 | Lynn Kobayashi | 3:17:54.0 | 2007 | Boston, USA (d) |
| 43 | Cate Hachigan | 3:19:00.0 | 1996 | Columbus, Ohio. |
| 44 | Meheret Asefa | 3:24:17.6 | 2011 | Toronto, Scotiabank |
| 45 | Adrienne Stewart | 3:24:24.0 | 1980 | Vancouver |
| 46 | Melissa Saunders | 3:26:59.0 | 2015 | |
| 47 | Lori Bowden | 3:27:50.0 | 1989 | New York, USA. Faster times in triathlons |
| 48 | Cynthia O'Halloran | 3:27:59.0 | 2013 | |
| 49 | Sandy Johnson | 3:28:30.0 | | |
| 50 | Carla Roy | 3:41:43.0 | 2011 | New York, USA |
