4, also known as Foreigner 4, is the fourth studio album by the British-American rock band Foreigner, released on July 3, 1981 on Atlantic Records. Several singles from the album were hits, including "Urgent", "Waiting for a Girl Like You" and "Juke Box Hero".

Foreigner is a British-American rock band formed in New York City in 1976 by guitarist Mick Jones, vocalist Lou Gramm, drummer Dennis Elliott, keyboardist Al Greenwood, bassist Ed Gagliardi and multi-instrumentalist Ian McDonald, the last of whom was also a founding member of King Crimson. Foreigner is one of the world's best-selling bands of all time, with worldwide sales of more than 80 million records, including 37.5 million in the US.