| 1101 | CONRAIL | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1102 | CONSERVATION LEAGUE | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1103 | CONSOL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1104 | CONSOL C | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1105 | CONSOL MINING COMPANY LLC SWITZ27 | Monroe County, OH | Gas Property | Jun 2025 |
| 1106 | CONSOLIDATED COAL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1107 | CONSOLIDATED FREIGHTWAYS | Summit County, OH | Oil & Gas Property | Dec 2020 |
| 1108 | CONSOLIDATION CO | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1109 | CONSOLIDATION COAL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1110 | CONSOLIDATION COAL C | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1111 | CONSOLIDATION COAL CO | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 1112 | CONSOLIDATION COAL CO | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 1113 | CONST | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1114 | CONSTITUTION | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1115 | CONSUMER | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1116 | CONWAY 21 | Belmont County, OH | Gas Property | Jun 2025 |
| 1117 | COOK | Athens County, OH | Oil & Gas Property | Dec 2022 |
| 1118 | COOK ELTON & ELSIE | Meigs County, OH | Oil & Gas Property | Dec 1997 |
| 1119 | COOK H | Meigs County, OH | Oil & Gas Property | Dec 2022 |
| 1120 | COOK S RCH BL 4H | Belmont County, OH | Gas Property | Jun 2025 |
| 1121 | COOK UNIT | Belmont County, OH | Gas Property | Jun 2025 |
| 1122 | COOKSON | Perry County, OH | Oil & Gas Property | Dec 2023 |
| 1123 | COOLEY | Portage County, OH | Oil & Gas Property | Dec 2024 |
| 1124 | COOMER J | Perry County, OH | Oil & Gas Property | Dec 2013 |
| 1125 | COOPER | Perry County, OH | Oil & Gas Property | Dec 2003 |
| 1126 | COOPER 8-13-5 | Carroll County, OH | Oil & Gas Property | Jun 2025 |
| 1127 | COOPERIDER | Perry County, OH | Oil & Gas Property | Dec 1994 |
| 1128 | COOPERRIDER | Perry County, OH | Oil & Gas Property | Dec 2023 |
| 1129 | COOPERRIDER | Licking County, OH | Oil Property | Dec 2024 |
| 1130 | COPELAND OAKS | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 1131 | COPPERWELD | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1132 | CORBETT | Wayne County, OH | Oil & Gas Property | Dec 2023 |
| 1133 | CORBETT | Washington County, OH | Oil & Gas Property | Dec 2024 |
| 1134 | CORBETT M | Perry County, OH | Oil Property | Dec 2024 |
| 1135 | CORDER E NTG HR | Harrison County, OH | Oil & Gas Property | Jun 2025 |
| 1136 | CORDER W NTG HR | Harrison County, OH | Oil & Gas Property | Jun 2025 |
| 1137 | CORDRAY | Morgan County, OH | Oil & Gas Property | Dec 2023 |
| 1138 | CORETTA BIGGS | Knox County, OH | Oil & Gas Property | Dec 2024 |
| 1139 | CORNELIUS | Guernsey County, OH | Oil & Gas Property | Dec 2024 |
| 1140 | CORNELL | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 1141 | CORNING MINING CO | Perry County, OH | Oil Property | Dec 2012 |
| 1142 | CORRELL | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1143 | COSHOCTON COUNTY AIRPORT AUTHORITY | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1144 | COSTANZO | Summit County, OH | Oil & Gas Property | Dec 1994 |
| 1145 | COTTERMAN | Ashtabula County, OH | Oil & Gas Property | Dec 2017 |
| 1146 | COTTERMAN | Perry County, OH | Oil & Gas Property | Dec 2024 |
| 1147 | COTTERMAN | Perry County, OH | Oil & Gas Property | Dec 1988 |
| 1148 | COTTERMAN | Perry County, OH | Oil & Gas Property | Dec 2024 |
| 1149 | COULTER | Licking County, OH | Oil & Gas Property | Dec 1987 |
| 1150 | COULTER | Perry County, OH | Oil & Gas Property | Dec 2012 |
| 1151 | COUNTY INFIRMARY | Morgan County, OH | Oil & Gas Property | Dec 2024 |
| 1152 | COURTNEY | Mahoning County, OH | Oil & Gas Property | Dec 2024 |
| 1153 | COVERT | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1154 | COWEN ETAL | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1155 | COWGILL | Guernsey County, OH | Oil & Gas Property | Dec 2022 |
| 1156 | COX GRAVEL | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1157 | COX JAMES | Sandusky County, OH | Oil Property | Dec 2024 |
| 1158 | COYOTE | Monroe County, OH | Gas Property | Jun 2025 |
| 1159 | CRAIG MILLER | Monroe County, OH | Gas Property | Jun 2025 |
| 1160 | CRAIG R | Guernsey County, OH | Oil & Gas Property | Dec 1993 |
| 1161 | CRANE | Portage County, OH | Oil & Gas Property | Dec 2024 |
| 1162 | CRAVAT COAL | Harrison County, OH | Gas Property | Jun 2025 |
| 1163 | CRAVAT N WHL BL | Belmont County, OH | Gas Property | Jun 2025 |
| 1164 | CRAVAT S WHL BL | Belmont County, OH | Gas Property | Jun 2025 |
| 1165 | CRAWFORD | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1166 | CRAWFORD | Coshocton County, OH | Oil & Gas Property | Dec 2024 |
| 1167 | CRAWFORD | Monroe County, OH | Gas Property | Jun 2025 |
| 1168 | CRAWFORD | Jefferson County, OH | Oil & Gas Property | Jun 2025 |
| 1169 | CRAWFORD | Muskingum County, OH | Oil Property | Dec 2024 |
| 1170 | CRAWMER | Licking County, OH | Oil & Gas Property | Dec 2024 |
| 1171 | CRAYFISHFARM ( | Hocking County, OH | Oil & Gas Property | Dec 2010 |
| 1172 | CREAMER | Jefferson County, OH | Gas Property | Jun 2025 |
| 1173 | CREE | Monroe County, OH | Oil & Gas Property | Dec 2024 |
| 1174 | CREIGHTON | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1175 | CREIGHTON | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1176 | CRESTONE UNIT | Monroe County, OH | Oil & Gas Property | Jun 2025 |
| 1177 | CREW | Trumbull County, OH | Oil & Gas Property | Dec 2024 |
| 1178 | CRICKET | Harrison County, OH | Gas Property | Jun 2025 |
| 1179 | CRIDER | Holmes County, OH | Oil & Gas Property | Dec 2024 |
| 1180 | CRIDER | Holmes County, OH | Oil & Gas Property | Dec 2024 |
| 1181 | CRILOW | Stark County, OH | Oil & Gas Property | Dec 2024 |
| 1182 | CRILOW | Holmes County, OH | Oil & Gas Property | Dec 2024 |
| 1183 | CRISLIP | Guernsey County, OH | Oil & Gas Property | Dec 2016 |
| 1184 | CROCK | Noble County, OH | Oil & Gas Property | Dec 2022 |
| 1185 | CROCK | Noble County, OH | Oil & Gas Property | Dec 2024 |
| 1186 | CROCKER | Medina County, OH | Oil & Gas Property | Dec 2024 |
| 1187 | CROMIKA 34-10-5 | Harrison County, OH | Oil & Gas Property | Jun 2025 |
| 1188 | CRONIN | Monroe County, OH | Oil & Gas Property | Dec 2022 |
| 1189 | CROSBY | Ashtabula County, OH | Oil & Gas Property | Dec 2023 |
| 1190 | CROSKEY | Holmes County, OH | Oil & Gas Property | Dec 2022 |
| 1191 | CROSS | Muskingum County, OH | Oil & Gas Property | Dec 2024 |
| 1192 | CROSS | Wayne County, OH | Oil & Gas Property | Dec 2024 |
| 1193 | CROSS | Carroll County, OH | Oil & Gas Property | Dec 2024 |
| 1194 | CROSS CREEK COAL | Tuscarawas County, OH | Oil & Gas Property | Dec 2024 |
| 1195 | CROSSER | Columbiana County, OH | Oil & Gas Property | Jun 2025 |
| 1196 | CROW-MORGAN | Gallia County, OH | Oil & Gas Property | Dec 2023 |
| 1197 | CROWELL | Jefferson County, OH | Gas Property | Jun 2025 |
| 1198 | CROWIE E RCH BL 3H | Belmont County, OH | Gas Property | Jun 2025 |
| 1199 | CROWIE RCH BL 1H | Belmont County, OH | Gas Property | Jun 2025 |
| 1200 | CROWN | Muskingum County, OH | Oil & Gas Property | Dec 2019 |