| Type 1915 305 mm howitzer | |
| Origin: | Russian Empire |
| Type: | Heavy gun |
| Is Artillery: | yes |
| Used By: | Russian Empire, Soviet Union |
| Wars: | World War I, World War II |
| Weight: | 63.9 t (140,874 lbs) |
| Caliber: | 305 mm (12 in) |
| Rate: | 0.3 rounds per minute |
| Velocity: | 442 m/s (1,450 ft/s) |
| Max Range: | 13.47 km (8.36 mi) |
| Elevation: | 58° |
| Traverse: | 60° |
Type 1915 305 mm howitzer (ru|305-мм гаубица образца 1915 года) was a Russian heavy howitzer that saw service during World War I and II. Originally intended for Naval use, it was later purchased by the Army at a cost of 271,500 Rubles per piece, with the first order of 8 being sent on 13 August 1915.