Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Oakland Memorial Cemetery | Cemetery | 124 | Johnson | 35 28 01 N | 093 28 33 W |
| Oakland Park | Park | 68 | Jefferson | 34 14 26 N | 092 02 22 W |
| Oakland Public Use Area | Park | 208 | Marion | 36 26 38 N | 092 37 50 W |
| Oakland School | School | 303 | Marion | 36 27 34 N | 092 34 33 W |
| Oakland School (historical) | School | 275 | Baxter | 36 21 40 N | 092 20 07 W |
| Oakland School (historical) | School | 109 | Faulkner | 34 57 59 N | 092 17 28 W |
| Oakland School (historical) | School | 117 | Faulkner | 35 09 25 N | 092 16 42 W |
| Oakland School (historical) | School | 120 | Pope | 35 16 53 N | 092 56 02 W |
| Oakland School (historical) | School | 126 | Randolph | 36 28 10 N | 090 49 38 W |
| Oakland School (historical) | School | 121 | Yell | 35 01 13 N | 093 11 33 W |
| Oaklawn | Populated Place | 48 | Desha | 33 54 40 N | 091 25 50 W |
| Oaklawn Cemetery | Cemetery | 95 | Independence | 35 45 54 N | 091 38 06 W |
| Oaklawn Cemetery | Cemetery | 61 | Monroe | 34 53 41 N | 091 11 52 W |
| Oaklawn Cemetery | Cemetery | 61 | Prairie | 34 47 08 N | 091 28 04 W |
| Oaklawn Cemetery | Cemetery | 69 | White | 35 15 21 N | 091 43 49 W |
| Oaklawn Church | Church | 70 | Bradley | 33 30 56 N | 092 14 46 W |
| Oaklawn Elementary School | School | 174 | Garland | 34 29 00 N | 093 03 53 W |
| Oaklawn Magnet School | School | 174 | Garland | 34 29 00 N | 093 03 53 W |
| Oaklawn Racetrack | Locale | 175 | Garland | 34 29 06 N | 093 03 31 W |
| Oaklawn United Methodist Church | Church | 173 | Garland | 34 28 54 N | 093 03 39 W |
| Oakley Chapel | Church | 398 | Benton | 36 20 04 N | 094 10 29 W |
| Oakley Chapel Cemetery | Cemetery | 400 | Benton | 36 20 04 N | 094 10 26 W |
| Oakley Chapel School (historical) | School | 398 | Benton | 36 20 04 N | 094 10 29 W |
| Oakley Lake | Reservoir | 77 | Jefferson | 34 10 24 N | 092 05 19 W |
| Oakley Lake Dam | Dam | 77 | Jefferson | 34 10 24 N | 092 05 19 W |
| Oakley Lake Number Two | Reservoir | 76 | Jefferson | 34 10 24 N | 092 05 13 W |
| Oakley Lake Number Two Dam | Dam | 76 | Jefferson | 34 10 24 N | 092 05 13 W |
| Oakridge Estates | Populated Place | 88 | Lonoke | 35 00 57 N | 092 00 10 W |
| Oaks Dormitory | Building | 77 | Clark | 34 07 43 N | 093 03 32 W |
| Oaks Hill | Summit | 176 | Randolph | 36 17 05 N | 091 14 34 W |
| Oakvale School (historical) | School | 135 | Faulkner | 35 14 10 N | 092 14 48 W |
| Oakview Church | Church | 75 | Poinsett | 35 38 10 N | 090 44 57 W |
| Oakwood | Populated Place | 65 | Lee | 34 43 48 N | 090 44 52 W |
| Oakwood (historical) | Populated Place | 229 | Garland | 34 42 39 N | 093 23 36 W |
| Oakwood Bayou | Stream | | Desha | 33 52 54 N | 091 27 05 W |
| Oakwood Cemetery | Cemetery | 239 | Garland | 34 42 49 N | 093 23 34 W |
| Oakwood Cemetery | Cemetery | 133 | Logan | 35 17 28 N | 093 42 57 W |
| Oakwood Church | Church | 85 | Pulaski | 34 53 13 N | 092 22 25 W |
| Oakwood Church (historical) | Church | 51 | Lincoln | 34 01 38 N | 091 30 46 W |
| Oakwood Elementary School | School | 84 | Greene | 36 04 17 N | 090 28 43 W |
| Oakwood School (historical) | School | 196 | Montgomery | 34 41 45 N | 093 23 53 W |
| Oakwoods (historical) | Populated Place | 81 | Drew | 33 34 30 N | 091 48 03 W |
| Oark | Populated Place | 311 | Johnson | 35 41 22 N | 093 34 21 W |
| Oark Baptist Church | Church | 321 | Johnson | 35 41 28 N | 093 34 17 W |
| Oark Elementary School | School | 309 | Johnson | 35 41 18 N | 093 34 39 W |
| Oark High School | School | 308 | Johnson | 35 41 18 N | 093 34 36 W |
| Oark Post Office | Post Office | 310 | Johnson | 35 41 23 N | 093 34 23 W |
| Oats Creek | Stream | | White | 35 25 38 N | 091 25 56 W |
| Obear (historical) | Populated Place | 76 | Craighead | 35 42 54 N | 090 50 36 W |
| Oberman Park | Park | 372 | Washington | 36 02 45 N | 094 10 22 W |
| Obin (historical) | Populated Place | 92 | Grant | 34 24 34 N | 092 18 30 W |
| Oconee (historical) | Populated Place | 116 | Randolph | 36 23 21 N | 091 08 50 W |
| Odd Fellows Cemetery | Cemetery | 70 | Phillips | 34 32 28 N | 090 39 43 W |
| Odd Fellows Widows and Orphans Home (historical) | Building | 95 | Independence | 35 46 41 N | 091 39 16 W |
| Ode Hollow | Valley | | Newton | 35 46 25 N | 093 18 58 W |
| Ode Maddox Elementary School | School | 246 | Montgomery | 34 37 12 N | 093 46 51 W |
| Odell | Populated Place | 502 | Washington | 35 46 21 N | 094 25 06 W |
| Odell Ford | Crossing | 252 | Polk | 34 16 45 N | 094 22 37 W |
| Oden | Populated Place | 232 | Montgomery | 34 37 08 N | 093 46 37 W |
| Oden Cemetery | Cemetery | 229 | Montgomery | 34 36 59 N | 093 46 43 W |
| Oden First Baptist Church | Church | 245 | Montgomery | 34 37 08 N | 093 46 49 W |
| Oden High School | School | 245 | Montgomery | 34 37 14 N | 093 46 48 W |
| Oden Post Office | Post Office | 232 | Montgomery | 34 37 08 N | 093 46 37 W |
| Oden Ranger Station | Locale | 273 | Montgomery | 34 37 25 N | 093 48 14 W |
| Oden United Methodist Church | Church | 231 | Montgomery | 34 37 00 N | 093 46 39 W |
| Oden Work Center | Locale | 270 | Montgomery | 34 37 29 N | 093 48 21 W |
| Odom Point | Summit | 251 | Van Buren | 35 25 42 N | 092 21 03 W |
| Oems Free Gift Church | Church | 51 | Desha | 33 53 19 N | 091 31 35 W |
| Officers Hollow | Valley | | Johnson | 35 32 52 N | 093 23 16 W |
| Offutt Landing | Populated Place | 40 | Phillips | 34 11 18 N | 090 54 09 W |
| Oga (historical) | Populated Place | 179 | Stone | 35 56 53 N | 092 17 13 W |
| Ogan Hollow | Valley | | Cleburne | 35 41 47 N | 091 57 32 W |
| Ogden | Populated Place | 96 | Little River | 33 34 57 N | 094 02 34 W |
| Ogden Cemetery | Cemetery | 304 | Newton | 35 47 04 N | 093 16 03 W |
| Ogden Church | Church | 475 | Madison | 35 53 55 N | 093 41 49 W |
| Ogden Creek | Stream | | Madison | 35 53 16 N | 093 40 45 W |
| Ogemaw | Populated Place | 66 | Ouachita | 33 27 45 N | 093 01 31 W |
| Ogilbie Cemetery | Cemetery | 165 | Johnson | 35 31 36 N | 093 37 08 W |
| Ogilbie Cemetery | Cemetery | 196 | Johnson | 35 32 24 N | 093 35 29 W |
| Ohlendorf Airport | Airport | 70 | Mississippi | 35 37 15 N | 089 59 10 W |
| Oil Belt Vocational Technical School | School | 73 | Union | 33 13 07 N | 092 36 59 W |
| Oil Trough | Populated Place | 69 | Independence | 35 37 51 N | 091 27 37 W |
| Oil Trough Elementary School | School | 65 | Independence | 35 38 55 N | 091 27 32 W |
| Oil Trough Ferry (historical) | Crossing | 68 | Independence | 35 38 35 N | 091 27 34 W |
| Oil Trough High School | School | 66 | Independence | 35 38 53 N | 091 27 35 W |
| Oil Trough Landing Strip | Airport | 73 | Jackson | 35 43 45 N | 091 07 05 W |
| Oil Well Hollow | Valley | | Scott | 34 57 07 N | 093 43 46 W |
| OK Bend | Bend | 47 | Lee | 34 37 43 N | 090 32 03 W |
| Okane Island | Island | 109 | Franklin | 35 22 16 N | 093 44 15 W |
| Okay | Populated Place | 97 | Howard | 33 46 03 N | 093 55 27 W |
| Okay (historical) | Populated Place | 524 | Pope | 35 33 21 N | 092 50 35 W |
| Okay Dike | Levee | 79 | Howard | 33 46 55 N | 093 55 56 W |
| Okay Dike Use Area | Park | 81 | Howard | 33 46 35 N | 093 55 41 W |
| Okay School (historical) | School | 104 | Howard | 33 45 59 N | 093 55 20 W |
| Oklahoma School (historical) | School | 239 | Montgomery | 34 27 20 N | 093 43 36 W |
| Okolona | Populated Place | 113 | Clark | 33 59 50 N | 093 20 17 W |
| Okolona Baptist Church | Church | 127 | Clark | 34 00 14 N | 093 20 11 W |
| Okolona Cemetery | Cemetery | 113 | Clark | 33 59 03 N | 093 20 12 W |
| Okolona Lookout Tower | Tower | 124 | Clark | 34 01 19 N | 093 17 55 W |
| Ola | Populated Place | 110 | Yell | 35 01 56 N | 093 13 24 W |
| Ola Elementary School | School | 124 | Yell | 35 02 07 N | 093 13 33 W |
| Ola High School | School | 125 | Yell | 35 02 08 N | 093 13 30 W |
| Ola Mountain | Ridge | 387 | Yell | 34 59 36 N | 093 11 54 W |
| Old 45 School (historical) | School | 116 | Howard | 33 55 22 N | 093 53 24 W |
| Old Alabam | Populated Place | 417 | Madison | 36 08 04 N | 093 40 47 W |
| Old Allens Ferry | Locale | 78 | Hempstead | 33 37 15 N | 093 51 38 W |
| Old Austin | Populated Place | 96 | Lonoke | 34 59 12 N | 091 57 51 W |
| Old Austin Cemetery | Cemetery | 87 | Lonoke | 34 59 24 N | 091 57 41 W |
| Old Baptist Cemetery | Cemetery | 140 | Pope | 35 20 45 N | 093 04 27 W |
| Old Bellville Church | Church | 121 | Sevier | 33 56 13 N | 094 10 11 W |