Hi Infidelity is the ninth studio album by American rock band REO Speedwagon, released on November 21, 1980, by Epic Records.

It went on to become the biggest-selling album of 1981, eventually being certified 10 times platinum by the Recording Industry Association of America.

The album art is an illustration of this pun where an act of sexual infidelity is apparently occurring while the man is putting a record LP to play on the hi-fi stereo.

The song "Tough Guys" uses an audio clip from the Our Gang short film Hearts Are Thumps (1937).

On July 19, 2011, Sony Music re-released Hi Infidelity with bonus demo tracks for the album's 30th anniversary.