"I Can See for Miles" is a song written by Pete Townshend of The Who, recorded for the band's 1967 album, The Who Sell Out. It was the only song from the album to be released as a single. It remains The Who's biggest hit single in the US to date, and, after debuting on the Hot 100 at #72 on 14 October 1967, their only one to reach the Top 10 of the Billboard Hot 100, at #9 on 25 November - 2 December 1967.

Recorded in several separate sessions in studios across two continents, the recording of "I Can See for Miles" exemplifies the increasingly sophisticated studio techniques of rock bands in the late 1960s, such as those used for the Beatles and the Beach Boys. The backing tracks were recorded in London, the vocals and overdubbing were performed in New York at Talentmasters Studios, and the album was mastered in Los Angeles at the Gold Star Studios. The initial UK mono pressing (Track Records) and the US Decca single has an overdubbed second bass line mixed upfront, whilst the drums are mixed slightly lower.

It reached number 10 in the UK and number 9 in the US. Though these figures would seem successful to most bands, Townshend was disappointed. He had written the song in 1966 but had held it back as an "ace in the hole", believing it would be The Who's first number one single. He is quoted as saying, "To me it was the ultimate Who record, yet it didn't sell. I spat on the British record buyer."

The song may have inspired The Beatles' "Helter Skelter". Paul McCartney recalls writing "Helter Skelter" after reading a review of The Who Sell Out in which the critic claimed that "I Can See for Miles" was the "heaviest" song he had ever heard. McCartney had not heard the song, but wrote "Helter Skelter" in an attempt to make an even "heavier" song than the one praised in the review.

"I Can See for Miles" was rarely performed live by The Who during the Keith Moon era; the complex vocal harmonies were difficult to replicate on stage, as was the percussion style found on the original recording. The song was performed on The Smothers Brothers Comedy Hour in September 1967, but it was mimed. It was performed more regularly beginning in 1979 when Kenney Jones became the band's drummer, albeit in a much more straightforward rhythm. It was also played at nearly every show of the group's 1989 tour with Simon Phillips on drums and has been performed a handful of times with current drummer Zak Starkey.

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