Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Kellers Run | Stream | | Warren | 39 17 57 N | 084 05 57 W |
| Keltner Cemetery | Cemetery | 266 | Warren | 39 20 15 N | 084 20 53 W |
| Kenricksville | Populated Place | 308 | Warren | 39 33 04 N | 084 09 56 W |
| Kessling Park | Park | 256 | Warren | 39 32 45 N | 084 12 54 W |
| Kings High School | School | 232 | Warren | 39 21 12 N | 084 15 20 W |
| Kings Island Amusement Park | Park | 229 | Warren | 39 20 36 N | 084 16 01 W |
| Kings Mall Shopping Center | Locale | 263 | Warren | 39 17 47 N | 084 19 04 W |
| Kings Mill Business Park | Locale | 231 | Warren | 39 21 20 N | 084 16 19 W |
| Kings Mills | Populated Place | 232 | Warren | 39 21 20 N | 084 14 55 W |
| Kings Mills Elementary School | School | 233 | Warren | 39 21 25 N | 084 14 51 W |
| Kings Stadium | Park | 225 | Warren | 39 21 05 N | 084 15 18 W |
| Kings-Mason Plaza Shopping Center | Locale | 261 | Warren | 39 20 24 N | 084 20 29 W |
| Kingswood Golf Course | Locale | 256 | Warren | 39 19 03 N | 084 17 41 W |
| Kirby Cemetery | Cemetery | 274 | Warren | 39 28 24 N | 084 12 08 W |
| Kitchener (historical) | Populated Place | 290 | Warren | 39 30 28 N | 084 09 35 W |
| Knoll Brook | Stream | | Warren | 39 29 42 N | 084 00 56 W |
| Kunkers Run | Stream | | Warren | 39 20 29 N | 084 03 13 W |
| Lake Forest | Reservoir | 259 | Warren | 39 32 30 N | 084 11 36 W |
| Lake Forest Dam | Dam | 259 | Warren | 39 32 30 N | 084 11 36 W |
| Landaker Cemetery | Cemetery | 245 | Warren | 39 19 41 N | 084 07 16 W |
| Landen | Populated Place | 248 | Warren | 39 18 43 N | 084 16 59 W |
| Landen Farm Dam | Dam | 241 | Warren | 39 19 18 N | 084 16 18 W |
| Landen Farm Lake | Reservoir | 241 | Warren | 39 19 18 N | 084 16 18 W |
| Landen Square Shopping Center | Locale | 249 | Warren | 39 18 34 N | 084 16 33 W |
| Landen-Deerfield Park | Park | 237 | Warren | 39 18 58 N | 084 15 54 W |
| Laura Farrell Elementary School | School | 207 | Warren | 39 33 53 N | 084 18 36 W |
| Laynecrest Plaza Shopping Center | Locale | 236 | Warren | 39 33 47 N | 084 16 60 W |
| Leather Ear Church | Church | 278 | Warren | 39 22 25 N | 084 00 44 W |
| Lebanon | Populated Place | 234 | Warren | 39 26 07 N | 084 12 11 W |
| Lebanon Cemetery | Cemetery | 232 | Warren | 39 26 18 N | 084 12 50 W |
| Lebanon Christian School | School | 247 | Warren | 39 26 30 N | 084 11 40 W |
| Lebanon City Hall | Building | 221 | Warren | 39 26 00 N | 084 12 28 W |
| Lebanon Commerical Historic District | Park | 223 | Warren | 39 26 03 N | 084 12 27 W |
| Lebanon Correctional Institution | Building | 241 | Warren | 39 26 01 N | 084 17 55 W |
| Lebanon East Commercial Industrial Park | Locale | 232 | Warren | 39 26 10 N | 084 11 40 W |
| Lebanon High School | School | 271 | Warren | 39 27 30 N | 084 12 20 W |
| Lebanon Post Office | Post Office | 219 | Warren | 39 25 58 N | 084 12 32 W |
| Lebanon Public Library | Building | 219 | Warren | 39 25 59 N | 084 12 31 W |
| Lebanon Public School (historical) | School | 229 | Warren | 39 26 16 N | 084 12 15 W |
| Lebanon-Warren County Airport | Airport | 270 | Warren | 39 27 37 N | 084 15 10 W |
| Lelan (historical) | Populated Place | 274 | Warren | 39 27 17 N | 084 10 43 W |
| Level High School (historical) | School | 283 | Warren | 39 16 48 N | 084 02 25 W |
| Liberty School (historical) | School | 253 | Warren | 39 26 12 N | 084 09 29 W |
| Lick Run | Stream | | Warren | 39 20 21 N | 084 05 03 W |
| Lilley Lake | Reservoir | 257 | Warren | 39 23 06 N | 084 07 60 W |
| Lilley Lake 9341-006 | Reservoir | 267 | Warren | 39 23 30 N | 084 08 48 W |
| Lilley Lake 9341-006 Dam | Dam | 267 | Warren | 39 23 30 N | 084 08 48 W |
| Lilley Lake Dam | Dam | 257 | Warren | 39 23 06 N | 084 07 60 W |
| Little Miami High School | School | 217 | Warren | 39 20 53 N | 084 08 15 W |
| Little Mount | Summit | 286 | Warren | 39 34 29 N | 084 16 40 W |
| Little Muddy Creek | Stream | | Warren | 39 23 42 N | 084 14 57 W |
| Littles Run | Stream | | Warren | 39 18 47 N | 084 07 18 W |
| Long Cemetery | Cemetery | 269 | Warren | 39 16 11 N | 084 08 09 W |
| Louisa Wright Elementary School | School | 231 | Warren | 39 25 25 N | 084 12 14 W |
| Loveland Park | Populated Place | 222 | Warren | 39 17 59 N | 084 15 48 W |
| Lower Mad Run | Stream | | Warren | 39 32 00 N | 084 11 09 W |
| Lukens Cemetery | Cemetery | 256 | Warren | 39 29 57 N | 084 01 36 W |
| Lytle | Populated Place | 314 | Warren | 39 33 39 N | 084 08 06 W |
| Lytle Cemetery | Cemetery | 307 | Warren | 39 33 37 N | 084 07 48 W |
| Lytle Methodist Church | Church | 308 | Warren | 39 33 37 N | 084 07 49 W |
| Maineville | Populated Place | 247 | Warren | 39 18 54 N | 084 13 15 W |
| Maineville Cemetery | Cemetery | 248 | Warren | 39 18 53 N | 084 12 31 W |
| Maplewood Orchard Airport | Airport | 266 | Warren | 39 23 03 N | 084 10 06 W |
| Maplewood Sanitorium | Building | 232 | Warren | 39 25 30 N | 084 12 23 W |
| Martins Run | Stream | | Warren | 39 18 12 N | 084 05 59 W |
| Mary Ann Klingling Childrens Home | Building | 228 | Warren | 39 26 06 N | 084 12 18 W |
| Mary Ellen | Populated Place | 193 | Warren | 39 21 58 N | 084 13 06 W |
| Maryhaven Juvenile Center | Locale | 218 | Warren | 39 26 10 N | 084 14 04 W |
| Mason | Populated Place | 247 | Warren | 39 21 36 N | 084 18 36 W |
| Mason Heights Elementary School | School | 244 | Warren | 39 21 42 N | 084 17 49 W |
| Mason High School | School | 258 | Warren | 39 20 45 N | 084 18 32 W |
| Mason Industrial Park | Locale | 228 | Warren | 39 22 35 N | 084 17 32 W |
| Mason Interstate Industrial Park | Locale | 270 | Warren | 39 19 56 N | 084 20 40 W |
| Mason Middle School | School | 246 | Warren | 39 21 44 N | 084 18 39 W |
| Mathers Mills | Populated Place | 206 | Warren | 39 25 53 N | 084 06 08 W |
| Meadows Park | Park | 250 | Warren | 39 21 25 N | 084 19 20 W |
| Merrittstown | Populated Place | 291 | Warren | 39 29 39 N | 084 11 60 W |
| Miami Cemetery | Cemetery | 252 | Warren | 39 31 18 N | 084 04 20 W |
| Miami Valley Memorial Garden | Cemetery | 312 | Warren | 39 33 47 N | 084 09 29 W |
| Mid-Western Childrens Home Dam | Dam | 265 | Warren | 39 16 48 N | 084 08 06 W |
| Mid-Western Childrens Home Reservoir | Reservoir | 265 | Warren | 39 16 48 N | 084 08 06 W |
| Middleboro | Populated Place | 274 | Warren | 39 21 02 N | 084 02 30 W |
| Middletown Christian School | School | 219 | Warren | 39 29 18 N | 084 19 21 W |
| Middletown Dam | Dam | 198 | Warren | 39 32 30 N | 084 21 48 W |
| Middletown Fire Station 2 | Building | | Warren | 39 29 55 N | 084 20 08 W |
| Middletown Junction | Locale | 192 | Warren | 39 21 45 N | 084 14 15 W |
| Middletown Reservoir | Reservoir | 198 | Warren | 39 32 30 N | 084 21 48 W |
| Midway Meadows Office Park | Locale | 254 | Warren | 39 33 48 N | 084 15 35 W |
| Midway Plaza Shopping Center | Locale | 250 | Warren | 39 33 40 N | 084 15 44 W |
| Mill Run | Channel | 218 | Warren | 39 31 54 N | 084 04 40 W |
| Miltomson | Populated Place | 281 | Warren | 39 19 07 N | 084 20 36 W |
| Mooneys Run | Stream | | Warren | 39 27 05 N | 084 14 16 W |
| Morrow | Populated Place | 195 | Warren | 39 21 16 N | 084 07 38 W |
| Morrow Cemetery | Cemetery | 209 | Warren | 39 21 03 N | 084 07 27 W |
| Morrow Church of the Nazarene | Church | 196 | Warren | 39 21 09 N | 084 07 39 W |
| Morrow Elementary School | School | 198 | Warren | 39 21 10 N | 084 07 56 W |
| Morrow United Methodist Church | Church | 216 | Warren | 39 21 01 N | 084 08 12 W |
| Mount Holly | Populated Place | 239 | Warren | 39 34 18 N | 084 01 57 W |
| Mount Holly Cemetery | Cemetery | 256 | Warren | 39 33 47 N | 084 02 03 W |
| Mount Olive Church | Church | 251 | Warren | 39 33 52 N | 084 16 18 W |
| Muddy Creek | Stream | | Warren | 39 21 54 N | 084 14 33 W |
| Mulfords Run | Stream | | Warren | 39 25 48 N | 084 14 18 W |
| Muntz Run | Stream | | Warren | 39 21 40 N | 084 07 26 W |
| Murdock | Populated Place | 248 | Warren | 39 17 31 N | 084 12 22 W |
| Murdock Cemetery | Cemetery | 248 | Warren | 39 16 53 N | 084 11 55 W |
| Murphy Pond | Reservoir | 278 | Warren | 39 23 42 N | 084 04 36 W |
| Murphy Pond Dam | Dam | 278 | Warren | 39 23 42 N | 084 04 36 W |
| New Hope Cemetery | Cemetery | 274 | Warren | 39 18 32 N | 084 01 26 W |
| New Hope School (historical) | School | 279 | Warren | 39 18 34 N | 084 01 24 W |
| Newman Run | Stream | | Warren | 39 30 59 N | 084 05 37 W |