| Conflict: | Western New Guinea campaign |
| Partof: | World War II, Pacific War |
| Date: | 22 April 1944 – 15 August 1945 |
| Place: | Territory of New Guinea and Netherlands New Guinea |
| Result: | Allied victory |
| Combatant1: |  United States Australia Netherlands United Kingdom |
| Strength1: | Unknown |
| Strength2: | Unknown |
| Casualties1: | 1,922+ killed or missing 8,000+ wounded |
| Casualties2: | 42,000+ dead and nearly 1,000 POWs |
The Western New Guinea campaign was a series of actions in the New Guinea campaign of World War II. Dutch East Indies KNIL, United States and Australian forces assaulted Japanese bases and positions in the northwest coastal areas of Netherlands New Guinea and adjoining parts of the Australian Territory of New Guinea. The campaign began with Operations Reckless and Persecution, which were amphibious landings by the U.S. I Corps at Hollandia and Aitape on 22 April 1944. Fighting in western New Guinea continued until the end of the war.
. Eustace Graham Keogh. South West Pacific 1941–45. 1965. Grayflower Publications. Melbourne, Victoria . 7185705 .
. Samuel Eliot Morison . New Guinea and the Marianas, March 1944 – August 1944 . 2001 . . University of Illinois Press . Urbana, Illinois . 978-0-25207-038-9.