United States Army Forces in the Philippines – Northern Luzon

{{Infobox military unit

| unit_name = United States Army Forces in the Philippines – Northern Luzon

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| dates = January 1, 1942 – June 30, 1946

| country = {{flagicon|United States|1912}} United States of America
{{flagicon|Philippine Commonwealth}} Commonwealth of the Philippines

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| type = light infantry, guerrilla resistance movement

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| size = about 20,000 men in 1945{{page needed|date=June 2019}}

| command_structure = United States Army
Philippine Army

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| battles = * World War II
* Japanese occupation of the Philippines (1942–44)
* Philippines Campaign (1944–45)
– Battle of Bacsil Ridge (March 19, 1945)
– Battle of Baguio (April 26, 1945)
– Battle of Mayoyao Ridge (July 26, 1945, to August 9, 1945)
– Battle of Bessang Pass (June 14, 1945)

| notable_commanders = Russell W. Volckmann

| anniversaries =

}}

The United States Army Forces in the Philippines – Northern Luzon or United States Armed Forces in the Philippines – Northern Luzon (USAFIP-NL) (Tagalog: Sandatahang Lakas ng Estados Unidos sa Pilipinas - Hilagang Luzon (SLEUP-HL)/Hukbong Sandatahan ng Estados Unidos sa Pilipinas - Hilagang Luzon (HSEUP-HL) Ilocano: Fuerza Armada ti Estados Unidos iti Filipinas - Amianan ti Luzon (FAEUF-AL)) was the military and guerrilla organization active in the Philippines after the Japanese occupation. It was made up of United States Army and Philippine Army soldiers, reservists and civilian volunteers.

It was active from January 1, 1942 to June 30, 1946 and commanded by Col. Moses, followed by Russell W. Volckmann.Volckmann, R., 1954, We Remained, New York: W. W. Norton & Company, Inc., {{ISBN|9780393350227}}{{rp|119–121}}

Following the Japanese occupation of the Philippines through the campaign to liberate the country, the military and guerrilla operations from the units of USAFIP-NL operated in Northern Luzon, including the some provinces in Ilocos Norte, Ilocos Sur, La Union, Abra, Mountain Province, Cagayan, Isabela and Nueva Vizcaya.