| Official Name: | Mormyshi |
| Native Name: | Мормыши |
| Settlement Type: | Selo |
| Pushpin Map: | Russia Altai Krai#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Name1: | Altai Krai |
| Subdivision Name3: | Romanovsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +7:00 |
| Coordinates: | 52.45°N 93°W[1] |
Mormyshi (ru|Мормыши) is a rural locality (a selo) and the administrative center of Mormyshansky Selsoviet, Romanovsky District, Altai Krai, Russia. The population was 149 as of 2013.[2] There is 1 street.
Mormyshi is located on the Gorkoye Lake,[3] 29km (18miles) south of Romanovo (the district's administrative centre) by road. Buranovka is the nearest rural locality.[4]