| Official Name: | Miller, Ohio |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Ohio#USA |
| Pushpin Label: | Miller |
| Coordinates: | 38.5325°N -82.3061°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Lawrence |
| Subdivision Type3: | Township |
| Subdivision Name3: | Rome |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.02 |
| Area Land Sq Mi: | 0.99 |
| Area Water Sq Mi: | 0.03 |
| Area Total Km2: | 2.64 |
| Area Land Km2: | 2.57 |
| Area Water Km2: | 0.07 |
| Population As Of: | 2020 |
| Population Total: | 455 |
| Population Density Km2: | 177.22 |
| Population Density Sq Mi: | 459.13 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 565 |
| Unit Pref: | Imperial |
| Postal Code Type: | ZIP Code |
| Postal Code: | 45623 (Crown City) |
| Area Code: | 740/220 |
| Blank Name: | FIPS code |
| Blank Info: | 39-50344 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2812824 |
Miller is an unincorporated community and census-designated place (CDP) in Lawrence County, Ohio, United States, along the Ohio River. It was first listed as a CDP prior to the 2020 census.
The CDP is in southeastern Lawrence County, in Rome Township. It sits on the west bank of the Ohio River and is bordered to the south by the village of Athalia. Ohio State Route 7 (Market Street) passes through the center of the community, leading north (upriver) to Gallipolis and southwest (downriver) to Chesapeake, across from Huntington, West Virginia. State Route 217 leads west from Miller 6miles to Scottown.