"Love Action (I Believe in Love)" is a song by the English synth-pop band the Human League, released as a single in the UK in July 1981. It became the band's first Top 10 success, peaking at number three in the UK singles chart.

The song was written jointly by lead vocalist Philip Oakey and keyboardist Ian Burden. It features lead vocal by Oakey and analogue synthesizers by Jo Callis, Philip Adrian Wright and Ian Burden. Drum machines, sequencing and programming were provided by producer Martin Rushent and his then engineer and programmer David M. Allen. One of the most notable synth sounds on the recording makes use of the pitch-to-voltage converter and envelope shaper on the Roland System 700 modular synth. Jo Callis' guitar strumming was fed into the synth and used to shape and trigger the sounds, producing an unusual choppy, strumming synth patch.

"Love Action (I Believe in Love)" was the second of three songs from the Human League's third studio album Dare to be released in advance of the album itself in 1981. It was released as a double A-side single with the non-album track "Hard Times". In the US, "Love Action (I Believe in Love)"/"Hard Times" made the dance charts twice: in 1981, the tracks first peaked at number thirty-seven, and one year later, re-entered the dance chart and peaked at number fifty-seven.

The song is a semi-autobiographical account of Philip Oakey's relationships. Oakey often refers to himself and at one point uses the lyric "this is Phil talking." The line was inspired by Iggy Pop's lyric "Jesus, this is Iggy" from his 1977 song "Turn Blue". The Human League had previously supported Iggy Pop live. Oakey borrows from another of his influences and the title "Love Action (I Believe in Love)" is named after the Lou Reed song "I Believe in Love" from his album Rock and Roll Heart (1976). The song contains another cryptic reference to Lou Reed in the lyric, "I believe what the old man said". Oakey, speaking in 1982 said, "no one ever asks me who the old man is... it's Lou (Reed)."

The release of the single was widely advertised in music press in early August 1981 with prominence given also to the B-side "Hard Times" as well as the A-side, and to the fact that a "limited" 12" single would also be made available as "Hard Times/Love Action" in "Disco Mix and Odd Mix" although these names were not used for the actual release. The single was designated 'Red' on the Human League's short-lived self-imposed labelling system of 'Blue' for pop songs and 'Red' for dance tracks.

The single made number 3 on the UK singles chart and placed the Human League in the forefront of media attention. It also renewed Virgin Records' faith in the band and guaranteed the release of the studio album that was to become Dare, just four months later.

"Love Action" was the 34th best-selling single in the UK in 1981. The song was ranked at number 5 among the top ten "Tracks of the Year" for 1981 by NME.

The song was sampled in the UK hit single "Something Good" from electronic music duo Utah Saints on their self-titled album in 1992 and by George Michael for his politically charged 2002 hit "Shoot the Dog" from his 2004 album Patience.