| O | |||||||
| LAST | FIRST | SCHOOL | GR | YR | PL | TIME | TEAM/IND |
| Oakes | Ryan | LaPorte | 10 | 1992 | 74 | 16:26.0 | Team |
| Oatess | Tyler | Bluffton | 11 | 1998 | 36 | 16:24.2 | Individual |
| Oberlin | Jeff | DeKalb | 10 | 1980 | 60 | 15:52.1 | Team |
| Oberlin | Jeff | DeKalb | 11 | 1981 | 8 | 15:08.3 | Team |
| Oberlin | Jeff | DeKalb | 12 | 1982 | 37 | 15:41.3 | Team |
| Obermeyer | William | Crown Point | 10 | 1973 | 66 | 13:05.0 | Team |
| Obermeyer | William | Crown Point | 11 | 1974 | 58 | 13:02.0 | Team |
| Obermeyer | William | Crown Point | 12 | 1975 | 87 | 13:31.0 | Team |
| O'Brien | James | Charlestown | 12 | 1958 | 136 | Team | |
| O'Brien | Josh | South Bend St. Joseph's | 12 | 2011 | 56 | 16:29.0 | Team |
| O'Brien | Joshua | South Bend St. Joseph's | 10 | 2009 | 144 | 18:09.6 | Team |
| O'Brien | Joshua | South Bend St. Joseph's | 11 | 2010 | 73 | 16:43.2 | Team |
| O'Brien | Scott | Franklin Central | 11 | 2001 | 140 | 17:46.0 | Team |
| O'Brien | Scott | Franklin Central | 12 | 2002 | 121 | 17:19.7 | Team |
| O'Brien | Ted | Heritage Hills | 11 | 2002 | 135 | 17:32.3 | Team |
| Ocasio | Gabe | Columbus North | 9 | 2007 | 142 | 17:38.1 | Team |
| Ocasio | Gabe | Columbus North | 10 | 2008 | 54 | 16:30.9 | Team |
| Ocasio | Gabe | Columbus North | 11 | 2009 | 22 | 16:49.2 | Team |
| Ocasio | Gabe | Columbus North | 12 | 2010 | 20 | 16:00.5 | Team |
| Ochs | Nick | Huntington North | 9 | 2001 | 162 | 18:27.0 | Team |
| Ochs | Nick | Huntington North | 10 | 2003 | 51 | 16:44.1 | Team |
| Ochs | Ross | Huntington North | 9 | 2006 | 89 | 17:30.7 | Team |
| Ochs | Ross | Huntington North | 10 | 2007 | 39 | 16:37.8 | Team |
| Ochs | Ross | Huntington North | 11 | 2008 | 23 | 16:03.6 | Team |
| Ochs | Ross | Huntington North | 12 | 2009 | 27 | 16:56.8 | Team |
| O'Connell | Riley | Terre Haute South | 11 | 1982 | 102 | 16:38.2 | Team |
| O'Connell | Tom | Fort Wayne Dwenger | 12 | 1977 | 15 | 12:37.0 | Team |
| O'Conner | Anthony | Hammond Bishop Noll | 11 | 1976 | 63 | Team | |
| O'Conner | Don | Chesterton | 10 | 1984 | 71 | 16:25.7 | Team |
| O'Conner | Don | Chesterton | 11 | 1985 | 82 | 16:49.8 | Team |
| O'Conner | Don | Chesterton | 12 | 1986 | 130 | 17:56.0 | Team |
| O'Connor | James | Gary Calumet | 11 | 1958 | 131 | Team | |
| O'Connor | James | Gary Calumet | 12 | 1959 | 147 | Team | |
| Oden | Larry | Columbus | 12 | 1970 | 71 | Team | |
| Oder | Robert | Madison | 9 | 1972 | 105 | Team | |
| O'Donnell | Thomas | Vincennes Lincoln | 11 | 1948 | 74 | Team | |
| O'Donnell | Thomas | Vincennes Lincoln | 12 | 1949 | 41 | Team | |
| Officer | Perry | Indianapolis Washington | 11 | 1964 | 37 | Team | |
| Ofsansky | Joseph | Terre Haute North | 10 | 1971 | 89 | Team | |
| Ofsansky | Joseph | Terre Haute North | 11 | 1972 | 32 | Team | |
| Ofsansky | Joseph | Terre Haute North | 12 | 1973 | 37 | 12:44.0 | Team |
| Oglesby | John | Valparaiso | 11 | 1953 | 103 | Team | |
| O'Hara | Elijah | Mishawaka | 11 | 2010 | 129 | 17:14.7 | Team |
| O'Hare | Matt | Lowell | 11 | 1998 | 50 | 16:32.9 | Individual |
| O'Herren | William | Indianapolis Cathedral | 12 | 2009 | 156 | 18:19.3 | Individual |
| Ohlman | Tom | Carmel | 10 | 2007 | 56 | 16:50.1 | Team |
| Ohlman | Tom | Carmel | 11 | 2008 | 27 | 16:06.2 | Team |
| Ohlman | Tom | Carmel | 12 | 2009 | 8 | 16:20.8 | Team |
| Olaosobikan | Fredrico | Munster | 10 | 2006 | 139 | 18:10.9 | Team |
| Oldenkamp | John | Wabash | 11 | 1947 | 106 | Team | |
| Oldenkamp | John | Wabash | 12 | 1948 | 61 | Team | |
| Oldham | Adam | Lawrence North | 10 | 2010 | 142 | 17:24.2 | Team |
| Olivarez | Alfinio | Gary Calumet | 11 | 1964 | 64 | Team | |
| Olivarez | Alfinio | Gary Calumet | 12 | 1965 | 9 | Team | |
| Oliver | Charles | Pike (Indpls) | 11 | 1978 | 8 | 12:22.4 | Individual |
| Oliver | Charles | Pike (Indpls) | 12 | 1979 | 10 | 12:20.7 | Individual |
| Oliver | Gary | Jeffersonville | 11 | 1971 | 90 | Team | |
| Oliver | John | Plymouth | 12 | 1987 | 45 | 15:54.0 | Team |
| Oliver | Roger | Carmel | 11 | 1973 | 65 | 13:04.0 | Team |
| Oliver | Roger | Carmel | 12 | 1974 | 76 | 13:13.0 | Team |
| Olson | Douglas | Fort Wayne South Side | 12 | 1973 | 105 | 13:48.0 | Team |
| Olvey | Jed | Fort Wayne Snider | 11 | 1968 | 32 | Team | |
| Ondras | Nicholas | Fort Wayne North Side | 11 | 2008 | 164 | 17:52.5 | Team |
| O'Neal | Kenneth | Martinsville | 10 | 1972 | 104 | Team | |
| O'Neal | Kenneth | Martinsville | 11 | 1973 | 73 | 13:16.0 | Team |
| O'Neal | Ricky | Lafayette Jefferson | 12 | 1981 | 65 | 16:02.5 | Team |
| Ooms | Ben | West Lafayette | 11 | 2008 | 182 | 18:29.6 | Team |
| Oppy | Mike | Southmont | 11 | 1986 | 29 | 16:08.0 | Individual |
| Oppy | Mike | Southmont | 12 | 1987 | 46 | 15:54.0 | Team |
| Opsahl | Jack | Southport | 10 | 1969 | 65 | Team | |
| Opsahl | Jack | Southport | 11 | 1970 | 31 | Team | |
| Opsahl | Jack | Southport | 12 | 1971 | 7 | Team | |
| Orban | Mike | Lake Central | 10 | 1982 | 45 | 15:48.3 | Team |
| Orban | Mike | Lake Central | 11 | 1983 | 45 | 15:56.5 | Team |
| Ordaz | Isaiah | Fort Wayne Snider | 12 | 2009 | 152 | 18:16.8 | Team |
| Oren | Dan | Northwestern | 9 | 1970 | 107 | Team | |
| Oren | Dan | Northwestern | 10 | 1971 | 93 | Team | |
| Oren | Larry | Muncie Central | 11 | 1950 | 38 | Team | |
| Oren | Larry | Muncie Central | 12 | 1951 | 66 | Team | |
| Oren | Lex | Fort Wayne Northrop | 12 | 1971 | 72 | Team | |
| Orender | Clayton | Bedford North Lawrence | 11 | 2010 | 175 | 18:03.4 | Team |
| Orender | Clayton | Bedford North Lawrence | 12 | 2011 | 98 | 16:52.2 | Team |
| Orender | Kyle | Plainfield | 12 | 1999 | 10 | 16:08.3 | Individual |
| Orlich | Manny | Chesterton | 10 | 2008 | 153 | 17:38.8 | Team |
| Orlich | Manny | Chesterton | 11 | 2009 | 112 | 17:50.0 | Team |
| Orlich | Manny | Chesterton | 12 | 2010 | 144 | 17:26.1 | Team |
| Orman | Greg | Fort Wayne Dwenger | 12 | 1977 | 11 | 12:33.0 | Team |
| Ormiston | Roy | Chesterton | 9 | 1954 | 77 | Team | |
| Ormiston | Roy | Chesterton | 11 | 1956 | 109 | Team | |
| Ormiston | Warren | Chesterton | 9 | 1952 | 120 | Team | |
| Ormiston | Warren | Chesterton | 10 | 1953 | 83 | Team | |
| Ormiston | Warren | Chesterton | 11 | 1954 | 41 | Team | |
| Ormiston | Warren | Chesterton | 12 | 1955 | 50 | Team | |
| Orr | Scott | Warren Central | 11 | 1981 | 114 | 16:51.0 | Team |
| Ortiz | Kevin | Eastside | 12 | 1991 | 66 | 16:21.0 | Team |
| Orzech | Phil | Michigan City Elston | 11 | 1959 | 153 | Team | |
| Orzech | Phil | Michigan City Elston | 12 | 1960 | 101 | Team | |
| Osborn | Dan | Chesterton | 11 | 2005 | 160 | 17:59.2 | Team |
| Osborn | Dan | Chesterton | 12 | 2006 | 110 | 17:45.1 | Team |
| Osborn | David | Chesterton | 9 | 2006 | 60 | 17:14.7 | Team |
| Osborn | David | Chesterton | 10 | 2007 | 19 | 16:21.7 | Team |
| Osborn | David | Chesterton | 11 | 2008 | 20 | 16:00.7 | Team |
| Osborn | David | Chesterton | 12 | 2009 | 4 | 16:06.1 | Team |
| Osborn | Greg | Chesterton | 11 | 2004 | 136 | 18:11.1 | Team |
| Osborn | Greg | Chesterton | 12 | 2005 | 150 | 17:40.0 | Team |
| Osborn | Gregg | Blackford | 11 | 1978 | 19 | 12:31.9 | Individual |
| Osborn | Gregg | Blackford | 12 | 1979 | 25 | 12:33.0 | Individual |
| Osborn | Matt | Chesterton | 10 | 2002 | 164 | 18:15.5 | Team |
| Osborn | Matt | Chesterton | 11 | 2003 | 129 | 17:31.6 | Team |
| Osborne | Bill | Richmond | 10 | 1996 | 167 | 18:43.0 | Team |
| Ostergren | Trace | Culver Academies | 12 | 2009 | 50 | 17:14.3 | Team |
| Osterhage | Lanny | Vincennes Lincoln | 12 | 1950 | 88 | Team | |
| Oswald | Randolph | Goshen | 11 | 1952 | 25 | Individual | |
| Oswald | Randolph | Goshen | 12 | 1953 | 34 | Team | |
| Otolski | Kevin | South Bend Adams | 9 | 1980 | 112 | 16:45.6 | Team |
| Overholzer | Terry | Washington | 12 | 1955 | 48 | Individual | |
| Overmyer | Robert | South Bend Riley | 12 | 1954 | 43 | Team | |
| Overshiner | Gerald | Seymour | 11 | 1985 | 119 | 17:25.4 | Team |
| Overway | Kyle | Logansport | 11 | 2009 | 68 | 17:25.1 | Individual |
| Overway | Kyle | Logansport | 12 | 2010 | 18 | 15:58.0 | Individual |
| Owen | Charles | Muncie Central | 12 | 1954 | 121 | Team | |
| Owen | Elijah | LaPorte | 12 | 2011 | 125 | 17:07.5 | Team |
| Owen | Mickey | Southport | 12 | 1958 | 19 | Team | |
| Owens | Greg | Washington | 12 | 1994 | 49 | 16:33.0 | Individual |
| Owensby | Don | Indianapolis Washington | 11 | 1952 | 69 | Team | |
| Owensby | Don | Indianapolis Washington | 12 | 1953 | 70 | Team | |
| Owensby | James | Indianapolis Washington | 12 | 1950 | 10 | Team | |
| Owensby | John | Indianapolis Washington | 11 | 1949 | 51 | Team | |
| Oxford | Shane | Heritage Hills | 12 | 2004 | 82 | 17:24.1 | Team |