| 1001 | COCKS P B | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1002 | COE 34-12-4 | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1003 | COFFEY | Athens County, OH | Oil & Gas Property | Dec 2023 |
| 1004 | COFFIELD | Belmont County, OH | Gas Property | Dec 2023 |
| 1005 | COFFMAN CL | Washington County, OH | Oil & Gas Property | Dec 2019 |
| 1006 | COFFMAN FARMS | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1007 | COLAIANNI | Jefferson County, OH | Gas Property | Dec 2023 |
| 1008 | COLBURN | Athens County, OH | Oil & Gas Property | Dec 2023 |
| 1009 | COLE | Guernsey County, OH | Oil & Gas Property | Dec 2023 |
| 1010 | COLE-KAESGEN | Holmes County, OH | Oil & Gas Property | Dec 2007 |
| 1011 | COLEMAN RCH BL | Belmont County, OH | Gas Property | Dec 2023 |
| 1012 | COLESCOTT 11-12-5 | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1013 | COLLECTORS S NTG HR | Harrison County, OH | Oil & Gas Property | Dec 2023 |
| 1014 | COLLECTORS TRIANGLE S U | Monroe County, OH | Gas Property | Dec 2023 |
| 1015 | COLLINS | Jefferson County, OH | Gas Property | Dec 2023 |
| 1016 | COLLINS | Guernsey County, OH | Oil & Gas Property | Dec 2022 |
| 1017 | COLLINS | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1018 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2022 |
| 1019 | COLOPY | Knox County, OH | Oil & Gas Property | Dec 2022 |
| 1020 | COLOPY WILFORD | Knox County, OH | Oil & Gas Property | Dec 1995 |
| 1021 | COLUMBIA | Lorain County, OH | Oil & Gas Property | Dec 2021 |
| 1022 | COLUMBIA CEMENT | Muskingum County, OH | Oil & Gas Property | Dec 2021 |
| 1023 | COLUMBIA FIRE BRICK CO | Tuscarawas County, OH | Gas Property | Dec 2022 |
| 1024 | COLUMBIA GAS TRANSMISSION | Hocking County, OH | Oil & Gas Property | Dec 2005 |
| 1025 | COLUMBUS B | Hocking County, OH | Oil & Gas Property | Dec 2022 |
| 1026 | COLUMBUS S | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1027 | COLUMBUS SOUTHER | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1028 | COLVILLE | Licking County, OH | Oil & Gas Property | Dec 2001 |
| 1029 | COLVIN | Monroe County, OH | Oil & Gas Property | Dec 2023 |
| 1030 | COMBS | Morgan County, OH | Oil & Gas Property | Dec 2021 |
| 1031 | COMFORT | Stark County, OH | Oil & Gas Property | Dec 2022 |
| 1032 | COMMISSIONERS | Guernsey County, OH | Oil & Gas Property | Dec 2023 |
| 1033 | COMMISSIONERS | Summit County, OH | Oil & Gas Property | Dec 2018 |
| 1034 | COMMUNITY IMPROVEMENT CORP | Mahoning County, OH | Oil & Gas Property | Dec 2023 |
| 1035 | COMP | Ashtabula County, OH | Oil & Gas Property | Dec 2022 |
| 1036 | COMSTOCK | Morrow County, OH | Oil & Gas Property | Dec 2023 |
| 1037 | CONARD | Coshocton County, OH | Oil Property | Dec 2022 |
| 1038 | CONE/HEMPHILL | Lake County, OH | Oil & Gas Property | Dec 2022 |
| 1039 | CONGER | Licking County, OH | Oil Property | Dec 2023 |
| 1040 | CONGLETON | Washington County, OH | Oil & Gas Property | Dec 2023 |
| 1041 | CONIGLIO 7-14-4 | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1042 | CONKLE | Coshocton County, OH | Oil & Gas Property | Dec 2022 |
| 1043 | CONKLE | Hocking County, OH | Oil & Gas Property | Dec 2021 |
| 1044 | CONKLE C | Coshocton County, OH | Oil & Gas Property | Dec 2022 |
| 1045 | CONKLIN 34-13-7 4 | Tuscarawas County, OH | Oil & Gas Property | Dec 2023 |
| 1046 | CONLEY DENVER & BONNIE | Medina County, OH | Oil & Gas Property | Dec 2007 |
| 1047 | CONNEAUT | Ashtabula County, OH | Oil & Gas Property | Dec 2022 |
| 1048 | CONNIE JO | Belmont County, OH | Gas Property | Dec 2023 |
| 1049 | CONOTTON | Carroll County, OH | Oil & Gas Property | Dec 2022 |
| 1050 | CONOTTON LAND | Tuscarawas County, OH | Oil & Gas Property | Dec 2023 |
| 1051 | CONOTTON LAND | Harrison County, OH | Oil & Gas Property | Dec 2023 |
| 1052 | CONOTTON LAND CO | Tuscarawas County, OH | Oil & Gas Property | Dec 2022 |
| 1053 | CONRAD | Wayne County, OH | Oil & Gas Property | Dec 2023 |
| 1054 | CONRAD | Licking County, OH | Oil & Gas Property | Dec 2022 |
| 1055 | CONRAD | Licking County, OH | Oil Property | Dec 1989 |
| 1056 | CONRAD CG | Coshocton County, OH | Oil & Gas Property | Dec 2022 |
| 1057 | CONRAIL | Trumbull County, OH | Oil & Gas Property | Dec 2023 |
| 1058 | CONRAIL | Trumbull County, OH | Oil & Gas Property | Dec 2023 |
| 1059 | CONSERVATION LEAGUE | Trumbull County, OH | Oil & Gas Property | Dec 2023 |
| 1060 | CONSOL | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1061 | CONSOL C | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1062 | CONSOL MINING COMPANY LLC SWITZ27 | Monroe County, OH | Gas Property | Dec 2023 |
| 1063 | CONSOLIDATED COAL | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1064 | CONSOLIDATED FREIGHTWAYS | Summit County, OH | Oil & Gas Property | Dec 2020 |
| 1065 | CONSOLIDATION CO | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1066 | CONSOLIDATION COAL | Muskingum County, OH | Oil & Gas Property | Dec 2022 |
| 1067 | CONSOLIDATION COAL C | Muskingum County, OH | Oil & Gas Property | Dec 2019 |
| 1068 | CONSOLIDATION COAL CO | Noble County, OH | Oil & Gas Property | Dec 2022 |
| 1069 | CONSOLIDATION COAL CO | Noble County, OH | Oil & Gas Property | Dec 2023 |
| 1070 | CONST | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1071 | CONSTITUTION | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1072 | CONSUMER | Trumbull County, OH | Oil & Gas Property | Dec 2023 |
| 1073 | CONWAY 21 | Belmont County, OH | Gas Property | Dec 2023 |
| 1074 | COOK | Athens County, OH | Oil & Gas Property | Dec 2022 |
| 1075 | COOK | Meigs County, OH | Oil Property | Dec 2021 |
| 1076 | COOK S RCH BL 4H | Belmont County, OH | Gas Property | Dec 2023 |
| 1077 | COOK UNIT | Belmont County, OH | Gas Property | Dec 2023 |
| 1078 | COOKSON | Perry County, OH | Oil & Gas Property | Dec 2023 |
| 1079 | COOLEY | Portage County, OH | Oil & Gas Property | Dec 2022 |
| 1080 | COOMER J | Perry County, OH | Oil & Gas Property | Dec 2013 |
| 1081 | COOPER | Perry County, OH | Oil & Gas Property | Dec 2003 |
| 1082 | COOPER 8-13-5 | Carroll County, OH | Oil & Gas Property | Dec 2023 |
| 1083 | COOPERIDER | Perry County, OH | Oil & Gas Property | Dec 1994 |
| 1084 | COOPERRIDER | Perry County, OH | Oil & Gas Property | Dec 2022 |
| 1085 | COOPERRIDER | Licking County, OH | Oil Property | Dec 2023 |
| 1086 | COPELAND OAKS | Mahoning County, OH | Oil & Gas Property | Dec 2022 |
| 1087 | COPPERWELD | Trumbull County, OH | Oil & Gas Property | Dec 2022 |
| 1088 | CORBETT | Wayne County, OH | Oil & Gas Property | Dec 2022 |
| 1089 | CORBETT | Washington County, OH | Oil & Gas Property | Dec 2022 |
| 1090 | CORDER E NTG HR | Harrison County, OH | Oil & Gas Property | Dec 2023 |
| 1091 | CORDER W NTG HR | Harrison County, OH | Oil & Gas Property | Dec 2023 |
| 1092 | CORDRAY | Morgan County, OH | Oil & Gas Property | Dec 2023 |
| 1093 | CORETTA BIGGS | Knox County, OH | Oil & Gas Property | Dec 2022 |
| 1094 | CORNELIUS | Guernsey County, OH | Oil & Gas Property | Dec 2023 |
| 1095 | CORNELL | Wayne County, OH | Oil & Gas Property | Dec 2023 |
| 1096 | CORNING MINING | Perry County, OH | Oil Property | Dec 2012 |
| 1097 | CORRELL | Stark County, OH | Oil & Gas Property | Dec 2022 |
| 1098 | COSHOCTON COUNTY AIRPORT AUTHORITY | Coshocton County, OH | Oil & Gas Property | Dec 2022 |
| 1099 | COSTANZO | Summit County, OH | Oil & Gas Property | Dec 1994 |
| 1100 | COTTERMAN | Ashtabula County, OH | Oil & Gas Property | Dec 2017 |