"Physical" is a song by the British-born Australian musician Olivia Newton-John for her twelfth studio album Physical. It was released in September 1981, by MCA Records as the lead single from the project. The song was written by Steve Kipner and Terry Shaddick, who originally intended to offer it to British singer-songwriter Rod Stewart, while production was handled by John Farrar.

The song was an immediate success, shipping 2 million copies in the United States, being certified Platinum, and spending 10 weeks at number one on the Billboard Hot 100, ultimately becoming Newton-John's biggest American hit. The song reached number 7 on the UK chart in November. The song was nominated for the Grammy Award for Best Female Pop Vocal Performance and won the Billboard Award for Top Pop Single.

Recorded in early 1981, it first rose to number one on the Billboard Hot 100 in America in November 1981 and stayed there for 10 weeks, until near the end of January 1982. It reached #2 on the Radio & Records CHR/Pop Airplay chart on November 27, 1981, staying there for two weeks and reamining on the chart for fourteen weeks. In terms of chart placement, it was the most popular single of her career in the U.S., as well as her final number-one (to date). Billboard ranked it as the number one pop single of 1982 (since the chart year for 1982 actually began in November 1981), and it was also the most successful song on the Hot 100 during the 1980s in terms of the number of weeks spent at number one. The guitar solo was performed by Steve Lukather.

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