Siege artillery (also siege guns or siege cannons) are heavy guns designed to bombard fortifications, cities, and other fixed targets. They are distinct from field artillery and are a class of siege weapon capable of firing heavy cannonballs or shells that required enormous transport and logistical support to operate. They lacked mobility and thus were rarely useful in more mobile warfare situations, generally having been superseded by heavy howitzers (towed and self-propelled artillery), strategic bomber aircraft, surface-to-surface missiles, ballistic missiles, cruise missiles and multiple rocket launchers in modern warfare.
| width=15% | Caliber (mm) | width=35% | Weapon name | width=25% | Country of origin | width=25% | Design |
|---|---|---|---|---|---|---|---|
| 106 | 1775 | ||||||
| 114 | 1862 | ||||||
| 121 | 1775 | ||||||
| 134 | 1775 | ||||||
| 148 | 1839 | ||||||
| 153 | 1775 | ||||||
| 163 | 1829 | ||||||
| 178 | 1841 | ||||||
| 200 | 16th century | ||||||
| 230 | 16th century | ||||||
| 650 | 1464 | ||||||
| 660 | First half of 15th century | ||||||
| 735 | 1411 | ||||||
| 820 | Early 15th century | ||||||
| 890 | 1586 | ||||||
| width=15% | Caliber (mm) | width=35% | Weapon name | width=25% | Country of origin | width=25% | Design |
|---|---|---|---|---|---|---|---|
| 88 | 1879– World War I | ||||||
| 107 | Russo-Japanese War | ||||||
| 120 | World War I | ||||||
| 120 | World War I, World War II | ||||||
| 120 | World War I | ||||||
| 120 | World War I | ||||||
| 149.1 | World War I | ||||||
| 149.1 | World War I | ||||||
| 149.1 | World War I | ||||||
| 149.1 | World War I | ||||||
| 149.1 | World War II | ||||||
| 149.7 | World War I | ||||||
| 150 |  Portugal / | World War I | |||||
| 152.4 | World War I | ||||||
| 152.5 | 1902–1915 | ||||||
| 152.4 | World War I | ||||||
| 152.4 | World War I | ||||||
| 152.4 | World War I, World War II | ||||||
| 155 | World War I | ||||||
| 155 | World War I | ||||||
| 155 | World War I | ||||||
| 180 | World War I | ||||||
| 203 | World War I | ||||||
| 209 | World War I | ||||||
| 209 | World War I | ||||||
| 210 | World War I | ||||||
| 210 | World War II | ||||||
| 210 | World War I, World War II | ||||||
| 210 | World War I | ||||||
| 210 | World War I | ||||||
| 220 | World War I | ||||||
| 220 | World War II | ||||||
| 229 | World War I | ||||||
| 233 | World War I | ||||||
| 240 | pre-World War I | ||||||
| 240 | World War II | ||||||
| 240 | World War I | ||||||
| 240 | World War I, World War II | ||||||
| 240 | World War I, World War II | ||||||
| 240 | World War I, World War II | ||||||
| 240 | World War II | ||||||
| 240 | World War II | ||||||
| 240 | World War II | ||||||
| 260 | World War I, World War II | ||||||
| 270 | World War I | ||||||
| 270 | World War I, World War II | ||||||
| 280 | World War I, World War II | ||||||
| 280 | World War II | ||||||
| 280 | Russo-Japanese War / World War I, World War II | ||||||
| 280 | World War I | ||||||
| 280 | World War I | ||||||
| 283 | World War I, World War II | ||||||
| 283 | World War I | ||||||
| 293 | World War I, World War II | ||||||
| 305 | World War I | ||||||
| 305 | World War II | ||||||
| 305 | World War I | ||||||
| 305 | World War I | ||||||
| 305 | World War II | ||||||
| 305 | World War I | ||||||
| 305 | World War I, World War II | ||||||
| 355 | World War II | ||||||
| 370 | World War I, World War II | ||||||
| 380 | World War I | ||||||
| 381 | World War I | ||||||
| 420 | World War I, World War II | ||||||
| 420 | World War I | ||||||
| 420 | World War I, World War II | ||||||
| 540 | World War II | ||||||
| 600 | World War II | ||||||
| 800 | World War II |