Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Hall Fork | Stream | | Adams | 38 44 53 N | 083 19 03 W |
| Hall Hollow | Valley | | Adams | 38 47 05 N | 083 19 32 W |
| Hamilton Cemetery | Cemetery | 248 | Adams | 38 45 09 N | 083 23 41 W |
| Hamilton Church | Church | 239 | Adams | 38 45 08 N | 083 23 39 W |
| Hamilton School (historical) | School | 280 | Adams | 38 43 55 N | 083 41 43 W |
| Hamilton School (historical) | School | 234 | Adams | 38 45 07 N | 083 23 36 W |
| Hannah Run | Stream | | Adams | 38 47 02 N | 083 36 10 W |
| Harmony Cemetery | Cemetery | 293 | Adams | 38 46 08 N | 083 29 13 W |
| Harmony School (historical) | School | 250 | Adams | 38 56 38 N | 083 30 54 W |
| Harpers Ferry School (historical) | School | 309 | Adams | 38 55 13 N | 083 40 13 W |
| Harshasville | Populated Place | 220 | Adams | 38 54 29 N | 083 32 40 W |
| Harshasville Bridge | Bridge | 219 | Adams | 38 54 28 N | 083 32 37 W |
| Harshasville Post Office (historical) | Post Office | 223 | Adams | 38 54 27 N | 083 32 33 W |
| Hayslip Cemetery | Cemetery | 267 | Adams | 38 43 09 N | 083 25 26 W |
| Hickman Run | Stream | | Adams | 38 45 37 N | 083 23 19 W |
| Hickory School (historical) | School | 311 | Adams | 38 52 26 N | 083 40 35 W |
| High Hill Cemetery | Cemetery | 378 | Adams | 38 43 10 N | 083 21 17 W |
| High Hill School (historical) | School | 376 | Adams | 38 43 33 N | 083 21 44 W |
| Hilderbran School (historical) | School | 246 | Adams | 39 00 48 N | 083 17 46 W |
| Hills Fork | Stream | | Adams | 38 47 36 N | 083 38 45 W |
| Hills School (historical) | School | 281 | Adams | 38 39 51 N | 083 38 52 W |
| Hog Run | Stream | | Adams | 38 45 07 N | 083 19 24 W |
| Holy Trinity Catholic Church | Church | 256 | Adams | 38 57 09 N | 083 24 27 W |
| Hoop Ridge | Ridge | 274 | Adams | 38 52 55 N | 083 26 31 W |
| Hoop Ridge School (historical) | School | 268 | Adams | 38 52 51 N | 083 26 03 W |
| Hopewell Cemetery | Cemetery | 287 | Adams | 38 44 36 N | 083 39 01 W |
| Hopewell Farm | Locale | 286 | Adams | 38 44 35 N | 083 38 55 W |
| Horner Cemetery | Cemetery | 261 | Adams | 38 58 28 N | 083 38 05 W |
| Horseshoe Bend | Bend | 220 | Adams | 38 59 03 N | 083 25 48 W |
| Hull Cemetery | Cemetery | 280 | Adams | 38 52 24 N | 083 29 19 W |
| Hunt Hollow | Valley | | Adams | 38 49 37 N | 083 20 40 W |
| Hut Hollow | Valley | | Adams | 38 42 04 N | 083 23 04 W |
| Independent Order of Oddfellows Cemetery | Cemetery | 298 | Adams | 38 47 53 N | 083 31 51 W |
| Irish Bottom | Flat | 165 | Adams | 38 36 27 N | 083 18 20 W |
| Iron Spring | Spring | 244 | Adams | 38 57 06 N | 083 16 45 W |
| Irvington (historical) | Populated Place | 248 | Adams | 38 56 27 N | 083 33 04 W |
| Irvington Post Office (historical) | Post Office | 248 | Adams | 38 56 27 N | 083 33 04 W |
| Irvington School (historical) | School | 259 | Adams | 38 56 31 N | 083 33 06 W |
| Isaacs Creek | Stream | | Adams | 38 40 46 N | 083 37 36 W |
| Island Creek | Stream | | Adams | 38 41 34 N | 083 34 28 W |
| Island Creek Boat Launch Ramp | Locale | 152 | Adams | 38 41 27 N | 083 35 01 W |
| Island Creek Church | Church | 176 | Adams | 38 43 02 N | 083 34 39 W |
| Island Creek School (historical) | School | 159 | Adams | 38 42 27 N | 083 34 55 W |
| J M Stuart Power Plant | Building | 161 | Adams | 38 38 16 N | 083 41 35 W |
| Jacksonville | Populated Place | 272 | Adams | 38 54 29 N | 083 26 24 W |
| Jacksonville Cemetery | Cemetery | 267 | Adams | 38 54 40 N | 083 26 10 W |
| Jacksonville Post Office (historical) | Post Office | 272 | Adams | 38 54 29 N | 083 26 24 W |
| Jaybird | Populated Place | 195 | Adams | 38 56 22 N | 083 17 54 W |
| Jaybird Branch | Stream | | Adams | 38 56 12 N | 083 17 33 W |
| Jaybird Cemetery | Cemetery | 202 | Adams | 38 56 21 N | 083 18 05 W |
| Jaybird Post Office (historical) | Post Office | 195 | Adams | 38 56 22 N | 083 17 54 W |
| Jefferson Elementary School | School | 204 | Adams | 38 46 43 N | 083 19 45 W |
| Jerry Ellis Landing | Locale | 149 | Adams | 38 41 20 N | 083 29 05 W |
| Jerusalem School (historical) | School | 269 | Adams | 38 48 02 N | 083 35 41 W |
| Jessup | Populated Place | 266 | Adams | 39 01 30 N | 083 31 59 W |
| Jessup Post Office (historical) | Post Office | 266 | Adams | 39 01 30 N | 083 31 59 W |
| Johnson Ridge State Nature Preserve | Park | 292 | Adams | 38 51 15 N | 083 31 60 W |
| Johnson Run | Stream | | Adams | 38 44 33 N | 083 18 53 W |
| Johnson Run School (historical) | School | 270 | Adams | 38 43 27 N | 083 19 51 W |
| Jones Cemetery | Cemetery | 265 | Adams | 38 50 47 N | 083 26 55 W |
| Jones Corner | Populated Place | 188 | Adams | 38 49 11 N | 083 17 33 W |
| Keith Hollow | Valley | | Adams | 38 41 18 N | 083 37 20 W |
| Kelley Cemetery | Cemetery | 281 | Adams | 39 02 27 N | 083 28 28 W |
| Kemmeters Landing | Locale | 151 | Adams | 38 40 12 N | 083 38 13 W |
| Kerr Run | Stream | | Adams | 39 01 45 N | 083 28 23 W |
| Kimballs Landing | Locale | 150 | Adams | 38 37 48 N | 083 40 43 W |
| Kirker Bridge | Bridge | 243 | Adams | 38 47 03 N | 083 36 12 W |
| Kirker Cemetery | Cemetery | 267 | Adams | 38 46 42 N | 083 36 10 W |
| Kirker Hollow | Valley | | Adams | 38 47 39 N | 083 40 39 W |
| Kirker School (historical) | School | 260 | Adams | 38 46 17 N | 083 35 54 W |
| Laurel Run | Stream | | Adams | 38 48 44 N | 083 18 43 W |
| Laurel School (historical) | School | 264 | Adams | 38 50 40 N | 083 33 18 W |
| Lawshe | Populated Place | 192 | Adams | 38 56 26 N | 083 28 11 W |
| Lawshe Cemetery | Cemetery | 194 | Adams | 38 56 33 N | 083 28 03 W |
| Lawshe Post Office (historical) | Post Office | 192 | Adams | 38 56 26 N | 083 28 11 W |
| Laycocks Farm Pond Dam Number One | Dam | 252 | Adams | 38 54 48 N | 083 28 60 W |
| Laycocks Farm Pond Dam Number Two | Dam | 235 | Adams | 38 55 00 N | 083 29 24 W |
| Laycocks Farm Pond Number One | Reservoir | 252 | Adams | 38 54 48 N | 083 28 60 W |
| Laycocks Farm Pond Number Two | Reservoir | 235 | Adams | 38 55 00 N | 083 29 24 W |
| Leonards Chapel | Church | 158 | Adams | 38 42 19 N | 083 30 42 W |
| Lewis Airport | Airport | 261 | Adams | 38 56 06 N | 083 23 58 W |
| Liberty Chapel | Church | 275 | Adams | 38 48 07 N | 083 36 10 W |
| Liberty Chapel | Church | 265 | Adams | 38 52 00 N | 083 23 34 W |
| Liberty Elementary School | School | 274 | Adams | 38 48 23 N | 083 37 56 W |
| Lick Fork | Stream | | Adams | 38 51 50 N | 083 27 16 W |
| Lick Fork Church | Church | 214 | Adams | 38 49 19 N | 083 30 33 W |
| Lick Run | Stream | | Adams | 38 48 07 N | 083 38 18 W |
| Lickskillet Branch | Stream | | Adams | 38 39 16 N | 083 40 57 W |
| Lindsey Creek | Stream | | Adams | 38 41 41 N | 083 33 59 W |
| Little East Fork Ohio Brush Creek | Stream | | Adams | 38 57 40 N | 083 27 07 W |
| Little Sulphur Creek | Stream | | Adams | 38 37 55 N | 083 19 24 W |
| Little West Fork Ohio Brush Creek | Stream | | Adams | 38 58 29 N | 083 35 29 W |
| Lock and Dam Number 32 (historical) | Dam | 147 | Adams | 38 39 18 N | 083 21 48 W |
| Lockhart Landing | Locale | 153 | Adams | 38 40 09 N | 083 25 23 W |
| Locust Grove | Populated Place | 239 | Adams | 38 59 18 N | 083 22 41 W |
| Locust Grove Cemetery | Cemetery | 281 | Adams | 38 58 42 N | 083 23 13 W |
| Locust Grove Wesleyan Church | Church | 238 | Adams | 38 59 35 N | 083 22 37 W |
| Locustgrove Post Office (historical) | Post Office | 239 | Adams | 38 59 18 N | 083 22 41 W |
| Long Lick Run | Stream | | Adams | 38 39 09 N | 083 21 10 W |
| Long Lick School (historical) | School | 169 | Adams | 38 40 07 N | 083 20 50 W |
| Louden | Populated Place | 239 | Adams | 39 01 36 N | 083 27 10 W |
| Loudon Cemetery | Cemetery | 238 | Adams | 39 01 38 N | 083 27 14 W |
| Louisville | Populated Place | 278 | Adams | 38 59 34 N | 083 27 52 W |
| Louisville Cemetery | Cemetery | 283 | Adams | 38 59 30 N | 083 27 46 W |
| Lovejoy Cemetery | Cemetery | 288 | Adams | 38 47 17 N | 083 31 60 W |
| Lower Brush Creek School (historical) | School | 251 | Adams | 38 58 26 N | 083 36 54 W |
| Lower Churn Creek School (historical) | School | 219 | Adams | 38 44 56 N | 083 19 02 W |
| Lower Sister Creek | Stream | | Adams | 38 41 59 N | 083 29 57 W |
| Lower Twin Creek School (historical) | School | 210 | Adams | 38 40 29 N | 083 18 12 W |
| Lynx | Populated Place | 249 | Adams | 38 46 23 N | 083 24 47 W |