Type 1915 305 mm howitzer (Russian: 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.

• List of siege artillery

• BL 12 inch Howitzer British equivalent
• Skoda 305 mm Model 1911 Austro-Hungarian equivalent