"On a Clear Day (You Can See Forever)" is a song recorded by American vocalist Barbra Streisand from the official soundtrack album to the 1970 American film On a Clear Day You Can See Forever. "On a Clear Day (You Can See Forever)" was written by Burton Lane and Alan Jay Lerner and produced by Wally Gold. The reprise rendition was released by Columbia Records as a promotional single on 7" vinyl in July 1970.

The track received positive reviews from music critics, with many of them listing it as a highlight on On a Clear Day You Can See Forever. Three variations of the song appear on the soundtrack: the original version sung by co-star Yves Montand, the reprise version sung by Streisand, and an orchestral version performed alongside a live chorus.

"On a Clear Day (You Can See Forever)" serves as the title track and main theme to the 1970 American film of the same name, in which Streisand stars as the main character. The song was recorded onset in early 1970 while filming the movie at Samuel Goldwyn Studios in West Hollywood, California. Three versions of the song exist and all appear on the accompanying soundtrack album. The original version is sung by Streisand's co-star Yves Montand, whereas the reprise version is performed by Streisand and the orchestral version is performed with a live chorus.

The reprise rendition was released as a promotional single on 7" vinyl in July 1970 by Columbia Records. The standard edition release includes both the mono and stereo versions of "On a Clear Day (You Can See Forever)" as the A-side and B-side, respectively. A limited edition version also exists, where the mono version exclusively appears on 7".

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