| Official Name: | East Alliance, Ohio |
| Settlement Type: | Census-designated place |
| Mapsize: | 260px |
| Coordinates: | 40.9133°N -81.0783°W |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | County |
| Subdivision Name2: | Mahoning |
| Subdivision Type3: | Township |
| Subdivision Name3: | Smith |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 0.83 |
| Area Land Sq Mi: | 0.79 |
| Area Water Sq Mi: | 0.03 |
| Area Total Km2: | 2.14 |
| Area Land Km2: | 2.05 |
| Area Water Km2: | 0.09 |
| Population As Of: | 2020 |
| Population Density Km2: | 130.48 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1059 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 44601 (Alliance) |
| Area Code: | 234/330 |
| Blank Name: | FIPS code |
| Blank Info: | 38-23254 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2812832 |
| Population Total: | 268 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 337.96 |
East Alliance is an unincorporated community and census-designated place (CDP) in Mahoning County, Ohio, United States. It was first listed as a CDP prior to the 2020 census.
The CDP is in the southwest corner of Mahoning County and the southwest corner of Smith Township. It is bordered to the west by the city of Alliance in Stark County and to the south by Knox Township in Columbiana County. U.S. Route 62, following the Columbiana County line, runs along the south edge of East Alliance; it leads west into Alliance and east to Salem.