Phillip Garth Law AC, CBE, FAA (21 April 1912 – 28 February 2010) was an Australian scientist and explorer who served as director of Australian National Antarctic Research Expeditions (ANARE) from 1949 to 1966.
Law was born in Tallangatta, Victoria, the second of six children of Arthur and Lily Law. One of his younger sisters was the traveller and writer Wendy Law Suart. After attending Hamilton High School, he taught in secondary schools, including Melbourne High School where he taught physics and boxing, while studying part-time at the University of Melbourne, earning an MSc in 1941. He was the Melbourne University lightweight boxing champion and also lectured in physics there from 1943 to 1948.
During the Second World War he enlisted in the RAAF, though the university physics department, which was involved in weapons research, insisted that he continue his work there. He did however manage to visit the battle areas of New Guinea on a four-month scientific mission for the Australian Army.
He spent the first of many summers in Antarctica in 1947–8 as a senior research officer on ANARE. He soon became director due to his strong belief in the value of management and educational techniques that ensured that each individual had more than one role. During his directorship, he established bases in Mawson, Davis and Casey, and led expeditions that explored more than 5,000 kilometres (3,100 mi) of coastline and some 1,000,000 square kilometres (390,000 sq mi) of territory.
After retiring from the directorship, he chaired the Australian National Committee on Antarctic Research from 1966 to 1980. He was elected President of the Royal Society of Victoria from 1967 to 1968.