| Official Name: | Otter, Ohio |
| Settlement Type: | Unincorporated community |
| Mapsize: | 250px |
| Pushpin Map: | Ohio |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Ohio |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Union |
| Unit Pref: | Imperial |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 1014 |
| Coordinates: | 40.2758°N -83.4192°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 43040 |
| Area Code: | 937, 326 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 1049046 |
Otter is an unincorporated community in Paris Township, Union County, Ohio, United States. It is located at 40.2758°N -83.4192°W, just northwest of Marysville, on the banks of Otter Run, at the intersection of Dog Leg Road and Westlake-Lee Road.[1]
Before 1900, there was a railroad station located here on the Western Division of the Toledo and Ohio Central Railway, but never a post office.[2] The railroad station was discontinued on May 26, 1954.[3]