| O | |||||||
| LAST | FIRST | SCHOOL | GR | YR | PL | TIME | TEAM/IND |
| O'Brien | Kelly | Crown Point | 10 | 1995 | 40 | 15:07.5 | Team |
| O'Brien | Kelly | Crown Point | 11 | 1996 | 35 | 15:48.0 | Individual |
| O'Brien | Kelly | Crown Point | 12 | 1997 | 48 | 15:41.6 | Team |
| Ochola | Raija | Fort Wayne Concordia | 10 | 2005 | 152 | 16:34.9 | Team |
| O'Conner | Melissa | Chesterton | 10 | 1987 | 127 | 16:50.0 | Team |
| O'Connor | Kelly | Highland | 12 | 1996 | 116 | 16:48.0 | Individual |
| O'Connor | Laura | Bloomington North | 9 | 2009 | 170 | 23:03.0 | Team |
| O'Connor | Laura | Bloomington North | 10 | 2010 | 170 | 21:52.0 | Team |
| O'Dell | Kerry | Southmont | 10 | 1985 | 113 | 17:02.0 | Team |
| Odom | Jill | Highland | 10 | 2002 | 33 | 15:21.3 | Individual |
| Odom | Jill | Highland | 12 | 2004 | 62 | 15:58.4 | Individual |
| Oeding | Lacey | Jasper | 9 | 2004 | 155 | 17:48.1 | Team |
| Oeding | Lacey | Jasper | 10 | 2005 | 132 | 16:09.5 | Team |
| Oeding | Lacey | Jasper | 11 | 2006 | 51 | 15:47.1 | Team |
| Oeding | Lacey | Jasper | 12 | 2007 | 7 | 18:54.7 | Individual |
| Ogle | Cendall | Warsaw | 11 | 2008 | 63 | 19:50.9 | Individual |
| Ogle | Cendall | Warsaw | 12 | 2009 | 65 | 20:51.7 | Individual |
| Ogle | Creigh | Warsaw | 12 | 2011 | 150 | 21:09.7 | Team |
| O'Hara | Kelly | Indianapolis Cathedral | 9 | 2003 | 39 | 15:23.6 | Team |
| O'Hara | Kelly | Indianapolis Cathedral | 10 | 2004 | 50 | 15:50.0 | Team |
| O'Hara | Kelly | Indianapolis Cathedral | 11 | 2005 | 45 | 15:01.1 | Team |
| O'Hear | Carol | Fort Wayne Northrop | 11 | 1991 | 113 | 17:07.0 | Team |
| Ojeda | Alma | Fort Wayne Elmhurst | 10 | 1984 | 73 | 15:45.2 | Team |
| Ojomo | Diana | Columbus North | 10 | 1996 | 109 | 16:40.0 | Team |
| Oleksak | Julia | South Bend St. Joseph's | 9 | 1990 | 89 | 16:37.0 | Team |
| Olivencia | Michelle | Portage | 10 | 1991 | 89 | 16:27.0 | Team |
| Olivencia | Michelle | Portage | 12 | 1993 | 43 | 15:42.0 | Team |
| Oliver | Jenni | Hobart | 10 | 1992 | 49 | 15:33.0 | Team |
| Oliver | Jenni | Hobart | 12 | 1994 | 56 | 15:42.0 | Team |
| Olivia | Lindsay | New Albany | 10 | 2002 | 154 | 17:28.9 | Team |
| Olsen | Rhonda | Highland | 11 | 1982 | 115 | 12:19.5 | Team |
| Olson | Christi | Maconaquah | 9 | 1985 | 47 | 15:39.2 | Team |
| Olson | Christi | Maconaquah | 10 | 1986 | 48 | 15:34.0 | Team |
| Olson | Christi | Maconaquah | 11 | 1987 | 25 | 14:53.0 | Team |
| Olson | Christi | Maconaquah | 12 | 1988 | 81 | 16:26.0 | Team |
| Onest | Amanda | Lake Central | 9 | 2009 | 134 | 22:07.9 | Team |
| Onest | Amanda | Lake Central | 10 | 2010 | 142 | 21:00.6 | Team |
| Onest | Amanda | Lake Central | 11 | 2011 | 161 | 21:19.0 | Team |
| Orth | Lacey | Evansville North | 10 | 2007 | 14 | 19:12.1 | Individual |
| Orth | Lacey | Evansville North | 11 | 2008 | 62 | 19:50.6 | Individual |
| Osborn | Hannah | Fort Wayne Concordia | 9 | 2006 | 71 | 16:00.9 | Team |
| Osborn | Hannah | Fort Wayne Concordia | 10 | 2007 | 98 | 20:36.7 | Team |
| Osborn | Kelsey | Kankakee Valley | 11 | 2008 | 177 | 22:09.0 | Team |
| Osborne | Heather | Michigan City Elston | 9 | 1993 | 42 | 15:41.0 | Team |
| Osborne | Heather | Michigan City Elston | 10 | 1994 | 59 | 15:45.0 | Team |
| Osborne | Heather | Michigan City | 12 | 1996 | 130 | 17:16.0 | Team |
| Ostaszewski | Melissa | Crown Point | 12 | 2009 | 92 | 21:17.5 | Team |
| Oster | Kylie | East Noble | 9 | 1995 | 164 | 17:01.0 | Team |
| Oster | Tangie | East Noble | 10 | 1995 | 105 | 15:57.0 | Team |
| Oswalt | Michelle | West Lafayette | 9 | 2003 | 26 | 15:10.5 | Team |
| Overman | Chris | North Central (Indpls) | 9 | 1992 | 104 | 16:27.0 | Team |
| Overton | Larra | New Albany | 9 | 1997 | 62 | 15:56.7 | Team |
| Overton | Larra | New Albany | 10 | 1998 | 76 | 15:47.0 | Team |
| Overton | Larra | New Albany | 11 | 1999 | 29 | 15:16.0 | Team |
| Overton | Larra | New Albany | 12 | 2000 | 160 | 17:31.0 | Team |
| Overton | Lyndsay | New Albany | 9 | 2001 | 44 | 15:29.0 | Team |
| Overton | Lyndsay | New Albany | 10 | 2002 | 39 | 15:28.5 | Team |
| Overton | Lyndsay | New Albany | 11 | 2003 | 52 | 15:30.8 | Individual |
| Overton | Lyndsay | New Albany | 12 | 2004 | 63 | 15:58.5 | Individual |
| Owen | Kim | Southport | 12 | 1981 | 45 | 11:18.1 | Team |
| Owen | Leah | Brownstown Central | 10 | 1997 | 143 | 17:19.5 | Team |
| Owens | Heidi | Fort Wayne Northrop | 9 | 1982 | 77 | 11:32.6 | Team |
| Owens | Heidi | Fort Wayne Northrop | 10 | 1983 | 44 | 11:04.3 | Team |
| Owens | Natalie | Madison | 11 | 2008 | 155 | 21:19.4 | Team |
| Owings | Amy | Floyd Central | 11 | 1983 | 91 | 11:44.3 | Team |
| Owings | Amy | Floyd Central | 12 | 1984 | 30 | 15:01.5 | Team |
| Oxford | Cecilia | Heritage Hills | 9 | 2007 | 108 | 20:41.9 | Team |
| Oxford | Cecilia | Heritage Hills | 10 | 2008 | 138 | 20:55.4 | Team |
| Oxford | Cecilia | Heritage Hills | 11 | 2009 | 85 | 21:14.7 | Team |
| Oxford | Tricia | Heritage Hills | 12 | 2007 | 105 | 20:40.9 | Team |