| Official Name: | Gromshin |
| Native Name: | Громшин |
| Settlement Type: | Village |
| Pushpin Label Position: | Location in Bulgaria |
| Subdivision Name: |  Bulgaria |
| Subdivision Type1: | Province |
| Subdivision Name1: | Montana Province |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Boychinovtsi |
| Timezone: | EET |
| Utc Offset: | +2 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +3 |
Gromshin is a village in Boychinovtsi Municipality, Montana Province, Bulgaria.[1]