Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Union Grove Cemetery | Cemetery | 185 | Ripley | 36 33 35 N | 090 59 53 W |
| Union Grove Cemetery | Cemetery | 295 | Sullivan | 40 14 16 N | 093 21 28 W |
| Union Grove Church | Church | 370 | Douglas | 36 51 17 N | 092 50 51 W |
| Union Grove Church | Church | 342 | Howell | 36 44 25 N | 092 03 37 W |
| Union Grove Church | Church | 417 | Lawrence | 36 57 10 N | 093 39 40 W |
| Union Grove Church | Church | 351 | Polk | 37 25 27 N | 093 11 31 W |
| Union Grove Church | Church | 299 | Putnam | 40 25 44 N | 093 09 38 W |
| Union Grove Church | Church | 117 | Stoddard | 36 59 56 N | 089 57 49 W |
| Union Grove Church | Church | 143 | Wayne | 37 07 51 N | 090 25 30 W |
| Union Grove Church (historical) | Church | 84 | Dunklin | 36 23 41 N | 089 58 25 W |
| Union Grove Church (historical) | Church | 90 | New Madrid | 36 45 38 N | 089 27 20 W |
| Union Grove Church (historical) | Church | 296 | Sullivan | 40 14 16 N | 093 21 25 W |
| Union Grove School | Locale | 342 | Polk | 37 25 52 N | 093 12 38 W |
| Union Grove School | School | 362 | Polk | 37 39 26 N | 093 28 27 W |
| Union Grove School (historical) | School | 268 | Grundy | 40 03 00 N | 093 23 12 W |
| Union Grove School (historical) | School | 242 | Montgomery | 38 59 50 N | 091 32 40 W |
| Union Grove School (historical) | School | 329 | Nodaway | 40 33 02 N | 095 05 16 W |
| Union Grove School (historical) | School | 220 | Scotland | 40 30 31 N | 092 04 34 W |
| Union Hall | Building | 252 | Macon | 39 41 13 N | 092 27 23 W |
| Union Hall (historical) | Locale | 265 | Macon | 39 54 38 N | 092 23 34 W |
| Union Hall Church | Church | 274 | Cedar | 37 49 38 N | 094 02 04 W |
| Union Hall School | School | 308 | Cass | 38 40 48 N | 094 19 27 W |
| Union Hall School (historical) | School | 264 | Cass | 38 32 40 N | 094 19 10 W |
| Union Hall School (historical) | School | 285 | Cedar | 37 49 37 N | 094 02 29 W |
| Union High School | School | 215 | Franklin | 38 26 52 N | 091 01 48 W |
| Union Hill | Summit | 350 | St. Francois | 37 43 06 N | 090 19 55 W |
| Union Hill Cemetery | Cemetery | 222 | Oregon | 36 44 49 N | 091 32 06 W |
| Union Hill Church | Church | 165 | Bollinger | 37 10 46 N | 090 03 51 W |
| Union Hill Church | Church | 161 | Carter | 36 59 07 N | 090 43 10 W |
| Union Hill Church | Church | 385 | Christian | 37 01 19 N | 093 20 09 W |
| Union Hill Church | Church | 337 | Christian | 36 57 58 N | 092 57 04 W |
| Union Hill Church | Church | 299 | Howell | 36 38 11 N | 091 44 30 W |
| Union Hill Church | Church | 300 | Howell | 36 38 12 N | 091 44 32 W |
| Union Hill Church | Church | 269 | Maries | 38 11 48 N | 091 51 32 W |
| Union Hill Church (historical) | Church | 222 | Oregon | 36 44 46 N | 091 32 07 W |
| Union Hill School | School | 331 | Christian | 36 58 01 N | 092 57 18 W |
| Union Hill School | School | 406 | Laclede | 37 33 24 N | 092 49 28 W |
| Union Hill School | School | 270 | Shannon | 37 19 00 N | 091 24 28 W |
| Union Hill School | School | 148 | Wayne | 36 58 24 N | 090 14 59 W |
| Union Hill School (historical) | School | 265 | Taney | 36 45 16 N | 092 57 21 W |
| Union Hollow | Valley | | McDonald | 36 36 05 N | 094 22 51 W |
| Union Home Cemetery | Cemetery | 318 | Dallas | 37 39 22 N | 093 02 24 W |
| Union Lake | Reservoir | 162 | Franklin | 38 22 55 N | 091 04 26 W |
| Union Lake Dam | Dam | 274 | Jackson | 39 04 12 N | 094 28 25 W |
| Union Light Church | Church | 263 | Bollinger | 37 29 44 N | 090 05 52 W |
| Union Memorial Auditorium | Building | 163 | Franklin | 38 26 39 N | 091 00 16 W |
| Union Middle School | School | 167 | Franklin | 38 26 54 N | 091 00 52 W |
| Union Mill Cemetery | Cemetery | 263 | Platte | 39 31 03 N | 094 38 22 W |
| Union Mill School (historical) | School | 251 | Platte | 39 31 07 N | 094 38 20 W |
| Union Mound Church | Church | 363 | Dallas | 37 29 28 N | 093 05 43 W |
| Union Park Cemetery | Cemetery | 116 | Scott | 37 10 26 N | 089 38 44 W |
| Union Plaza | Locale | 149 | St. Louis | 38 31 57 N | 090 18 30 W |
| Union Point | Populated Place | 290 | Jackson | 38 57 02 N | 094 27 58 W |
| Union Point Cemetery | Cemetery | 279 | St. Clair | 37 56 33 N | 093 55 53 W |
| Union Point Church | Church | 312 | Cedar | 37 36 59 N | 093 39 03 W |
| Union Point School | School | 300 | Jackson | 38 57 02 N | 094 28 33 W |
| Union Point School | School | 219 | Oregon | 36 31 15 N | 091 35 27 W |
| Union Point School | School | 280 | St. Clair | 37 56 22 N | 093 55 33 W |
| Union Point School (historical) | School | 284 | Johnson | 38 40 03 N | 093 41 58 W |
| Union Police Department | Building | 171 | Franklin | 38 26 42 N | 091 00 21 W |
| Union Post Office | Post Office | 166 | Franklin | 38 27 23 N | 091 00 09 W |
| Union Ridge Church | Church | 166 | Bollinger | 37 20 27 N | 089 56 29 W |
| Union Ridge Church | Church | 392 | Stone | 36 58 43 N | 093 24 41 W |
| Union Ridge School | School | 167 | Bollinger | 37 20 29 N | 089 56 26 W |
| Union Ridge School | School | 272 | Macon | 39 58 31 N | 092 32 25 W |
| Union Ridge School | School | 307 | Polk | 37 38 04 N | 093 18 46 W |
| Union Road County Park | Park | 134 | St. Louis | 38 31 12 N | 090 18 40 W |
| Union School | Locale | 302 | Camden | 37 55 18 N | 092 39 31 W |
| Union School | Locale | 209 | Clark | 40 21 42 N | 091 45 12 W |
| Union School | Locale | 215 | Lewis | 40 14 25 N | 091 55 55 W |
| Union School | Locale | 226 | Moniteau | 38 39 28 N | 092 26 30 W |
| Union School | Locale | 229 | Pike | 39 09 46 N | 091 19 42 W |
| Union School | School | 329 | Andrew | 40 00 60 N | 094 53 20 W |
| Union School | School | 316 | Atchison | 40 34 13 N | 095 36 34 W |
| Union School | School | 291 | Barton | 37 25 57 N | 094 28 55 W |
| Union School | School | 266 | Boone | 39 10 35 N | 092 09 55 W |
| Union School | School | 172 | Franklin | 38 26 36 N | 091 00 30 W |
| Union School | School | 211 | Franklin | 38 29 01 N | 091 07 13 W |
| Union School | School | 282 | Hickory | 38 04 15 N | 093 28 41 W |
| Union School | School | 337 | Holt | 40 01 30 N | 095 07 32 W |
| Union School | School | 213 | Howard | 39 03 19 N | 092 32 57 W |
| Union School | School | 127 | Perry | 37 42 37 N | 089 37 03 W |
| Union School | School | 322 | Polk | 37 47 43 N | 093 26 25 W |
| Union School | School | 317 | Polk | 37 41 48 N | 093 17 46 W |
| Union School | School | 184 | Ripley | 36 33 35 N | 090 59 46 W |
| Union School | School | 265 | St. Clair | 37 57 21 N | 093 40 39 W |
| Union School | School | 345 | Texas | 37 16 48 N | 092 04 38 W |
| Union School | School | 446 | Texas | 37 04 40 N | 092 06 27 W |
| Union School | School | 250 | Vernon | 37 53 02 N | 094 06 12 W |
| Union School (historical) | School | 272 | Atchison | 40 24 16 N | 095 37 36 W |
| Union School (historical) | School | 251 | Audrain | 39 05 54 N | 091 52 52 W |
| Union School (historical) | School | 339 | Buchanan | 39 35 29 N | 094 51 45 W |
| Union School (historical) | School | 229 | Clark | 40 31 03 N | 091 54 38 W |
| Union School (historical) | School | 310 | Gentry | 40 21 55 N | 094 24 18 W |
| Union School (historical) | School | 269 | Harrison | 40 08 31 N | 094 00 32 W |
| Union School (historical) | School | 258 | Henry | 38 28 50 N | 093 43 35 W |
| Union School (historical) | School | 257 | Jackson | 39 09 21 N | 094 20 39 W |
| Union School (historical) | School | 318 | Jasper | 37 05 41 N | 094 11 26 W |
| Union School (historical) | School | 355 | Lawrence | 37 13 47 N | 093 38 10 W |
| Union School (historical) | School | 385 | Lawrence | 37 03 41 N | 093 58 06 W |
| Union School (historical) | School | 217 | Linn | 39 43 31 N | 093 17 07 W |
| Union School (historical) | School | 316 | Mercer | 40 26 47 N | 093 41 04 W |
| Union School (historical) | School | 228 | Monroe | 39 25 41 N | 092 06 22 W |
| Union School (historical) | School | 219 | Montgomery | 38 59 32 N | 091 38 10 W |
| Union School (historical) | School | 388 | Newton | 36 46 50 N | 094 09 58 W |
| Union School (historical) | School | 316 | Nodaway | 40 23 21 N | 094 51 09 W |
| Union School (historical) | School | 355 | Phelps | 38 01 50 N | 091 43 27 W |
| Union School (historical) | School | 300 | Putnam | 40 27 40 N | 092 53 12 W |
| Union School (historical) | School | 315 | Ray | 39 25 14 N | 094 07 49 W |
| Union School (historical) | School | 220 | Ray | 39 15 05 N | 094 11 51 W |