| 1001 | CLAYTON B | Perry County, OH | Oil Property | Dec 2001 |
| 1002 | CLEANERS HANG | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1003 | CLEGG | Monroe County, OH | Oil Property | Dec 2024 |
| 1004 | CLEMENS | Coshocton County, OH | Oil & Gas Property | Dec 2021 |
| 1005 | CLEMENS BECKER | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 1006 | CLEVELAND | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 1007 | CLEVELAND | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 1008 | CLEVELAND B | Harrison County, OH | Oil & Gas Property | Dec 2024 |
| 1009 | CLEVELAND BOY SCOUTS OF AMERICA | Lorain County, OH | Oil & Gas Property | Dec 2024 |
| 1010 | CLEVELAND CATHOLIC | Medina County, OH | Oil & Gas Property | Dec 1995 |
| 1011 | CLEVELAND HIGHLAND | Cuyahoga County, OH | Oil & Gas Property | Dec 2024 |
| 1012 | CLEVELAND METROP | Medina County, OH | Oil & Gas Property | Dec 2024 |
| 1013 | CLEVELAND QUARRIES | Erie County, OH | Oil & Gas Property | Dec 2024 |
| 1014 | CLEVELAND/SENECA GOLF COURSE | Cuyahoga County, OH | Oil & Gas Property | Dec 2024 |
| 1015 | CLIFFORD CHANEY | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1016 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2023 |
| 1017 | CLINE | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1018 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1019 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1020 | CLINE | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 1021 | CLINE | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1022 | CLINE DAV | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1023 | CLINE LUTHER (WOOL MICHAEL) | Monroe County, OH | Oil & Gas Property | Dec 2016 |
| 1024 | CLINGER | Morrow County, OH | Oil Property | Dec 2011 |
| 1025 | CLINTON OIL | Ashtabula County, OH | Oil & Gas Property | Dec 2015 |
| 1026 | CLINTON SLAUGHTER | Muskingum County, OH | Oil & Gas Property | Dec 2013 |
| 1027 | CLOSE | Holmes County, OH | Oil & Gas Property | Dec 2024 |
| 1028 | CLOSE | Washington County, OH | Oil & Gas Property | Dec 2023 |
| 1029 | CLOUSE | Perry County, OH | Oil & Gas Property | Dec 2022 |
| 1030 | CLUB NE SMF JF | Jefferson County, OH | Gas Property | Dec 2024 |
| 1031 | CLUB NW SMF JF | Jefferson County, OH | Gas Property | Dec 2024 |
| 1032 | CLUB SE SMF JF 8H | Jefferson County, OH | Gas Property | Dec 2024 |
| 1033 | CLUTTER | Knox County, OH | Oil & Gas Property | Dec 2023 |
| 1034 | CLYDE HENDERSON | Perry County, OH | Oil & Gas Property | Dec 2014 |
| 1035 | CNGD-ABRAMS | Geauga County, OH | Oil & Gas Property | Dec 2008 |
| 1036 | CNX UNIT OH121000 | Noble County, OH | Oil & Gas Property | Dec 2021 |
| 1037 | COAD OXF GR | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 1038 | COAKLEY | Hocking County, OH | Oil & Gas Property | Dec 2022 |
| 1039 | COAL UNIT | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 1040 | COBLE | Perry County, OH | Oil & Gas Property | Dec 2018 |
| 1041 | COBLE FLORENCE | Perry County, OH | Oil Property | Dec 2022 |
| 1042 | COBLENTZ | Holmes County, OH | Oil & Gas Property | Dec 2022 |
| 1043 | COBLENTZ | Holmes County, OH | Oil & Gas Property | Dec 2022 |
| 1044 | COBRA CDZ HR | Harrison County, OH | Oil & Gas Property | Dec 2024 |
| 1045 | COCHE | Perry County, OH | Oil & Gas Property | Dec 2002 |
| 1046 | COCHRAN | Licking County, OH | Oil Property | Dec 2016 |
| 1047 | COCHRELL | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 1048 | COCKS P B | Washington County, OH | Oil & Gas Property | Dec 2023 |
| 1049 | COE 34-12-4 | Carroll County, OH | Oil & Gas Property | Dec 2024 |
| 1050 | COFFEY | Athens County, OH | Oil & Gas Property | Dec 2023 |
| 1051 | COFFIELD | Belmont County, OH | Gas Property | Dec 2024 |
| 1052 | COFFMAN CLARENCE | Washington County, OH | Oil & Gas Property | Dec 2019 |
| 1053 | COFFMAN FARMS | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1054 | COLAIANNI | Jefferson County, OH | Gas Property | Dec 2024 |
| 1055 | COLBURN | Athens County, OH | Oil & Gas Property | Dec 2023 |
| 1056 | COLE | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 1057 | COLE-KAESGEN | Holmes County, OH | Oil & Gas Property | Dec 2007 |
| 1058 | COLEMAN RCH BL | Belmont County, OH | Gas Property | Dec 2024 |
| 1059 | COLESCOTT 11-12-5 | Carroll County, OH | Oil & Gas Property | Dec 2024 |
| 1060 | COLLECTORS S NTG HR | Harrison County, OH | Oil & Gas Property | Dec 2024 |
| 1061 | COLLECTORS TRIANGLE S U | Monroe County, OH | Gas Property | Dec 2024 |
| 1062 | COLLINS | Jefferson County, OH | Gas Property | Dec 2024 |
| 1063 | COLLINS | Guernsey County, OH | Oil & Gas Property | Dec 2022 |
| 1064 | COLLINS | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1065 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2023 |
| 1066 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2024 |
| 1067 | COLOPY WILFORD | Knox County, OH | Oil & Gas Property | Dec 1995 |
| 1068 | COLUMBIA | Lorain County, OH | Oil & Gas Property | Dec 2021 |
| 1069 | COLUMBIA CEMENT | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1070 | COLUMBIA FIRE BRICK CO | Tuscarawas County, OH | Gas Property | Dec 2024 |
| 1071 | COLUMBIA GAS TRANSMISSION | Hocking County, OH | Oil & Gas Property | Dec 2005 |
| 1072 | COLUMBUS B | Hocking County, OH | Oil & Gas Property | Dec 2022 |
| 1073 | COLUMBUS S | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1074 | COLUMBUS SOUTHER | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1075 | COLVILLE | Licking County, OH | Oil & Gas Property | Dec 2001 |
| 1076 | COLVIN | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1077 | COMBS | Morgan County, OH | Oil & Gas Property | Dec 2024 |
| 1078 | COMFORT | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1079 | COMMISSIONERS | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 1080 | COMMISSIONERS | Summit County, OH | Oil & Gas Property | Dec 2018 |
| 1081 | COMMUNITY IMPROVEMENT CORP | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 1082 | COMP | Ashtabula County, OH | Oil & Gas Property | Dec 2024 |
| 1083 | COMPSON DANIEL | Monroe County, OH | Oil Property | Dec 2024 |
| 1084 | COMSTOCK | Morrow County, OH | Oil & Gas Property | Dec 2024 |
| 1085 | CONARD | Coshocton County, OH | Oil Property | Dec 2024 |
| 1086 | CONE/HEMPHILL | Lake County, OH | Oil & Gas Property | Dec 2024 |
| 1087 | CONGER | Licking County, OH | Oil Property | Dec 2024 |
| 1088 | CONGLETON | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1089 | CONIGLIO 7-14-4 | Carroll County, OH | Oil & Gas Property | Dec 2024 |
| 1090 | CONKLE | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1091 | CONKLE | Hocking County, OH | Oil & Gas Property | Dec 2023 |
| 1092 | CONKLE C | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1093 | CONKLE JOHN | Coshocton County, OH | Oil & Gas Property | Dec 2023 |
| 1094 | CONKLIN 34-13-7 4 | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1095 | CONLEY DENVER & BONNIE | Medina County, OH | Oil & Gas Property | Dec 2007 |
| 1096 | CONNEAUT | Ashtabula County, OH | Oil & Gas Property | Dec 2023 |
| 1097 | CONNIE JO | Belmont County, OH | Gas Property | Dec 2024 |
| 1098 | CONOTTON | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1099 | CONOTTON LAND | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1100 | CONOTTON LAND | Harrison County, OH | Oil & Gas Property | Dec 2024 |