Professional ratings
Review scores
Source	Rating
AllMusic
Alternative Press
Chicago Tribune
Entertainment Weekly	B−
Los Angeles Times
NME	5/10
Pitchfork Media	7.0/10
Rolling Stone
The Rolling Stone Album Guide
Spin	6/10

Nimrod (stylized as nimrod.) is the fifth studio album by American punk rock band Green Day, released on October 14, 1997 through Reprise Records. The group began work on the album in the wake of their cancellation of a European tour after the release of Insomniac (1995). Recorded at Conway Studios in Los Angeles, the album was written with the intent of creating a set of stand-alone songs as opposed to a cohesive album.

The album peaked at number ten on the Billboard U.S. charts and was certified double platinum by the Recording Industry Association of America (RIAA). The record was also certified triple platinum in Australia and double platinum in Canada. Upon release, Nimrod received generally positive reviews from critics, who praised Armstrong's songwriting. The album yielded the acoustic hit "Good Riddance (Time of Your Life)", which appeared in numerous pop culture events, including the series finale of the sitcom Seinfeld in 1998. To promote the album, Green Day embarked on an extensive touring schedule.

Retrospectively, Nimrod is noted for its musical diversity and experimentation. It contains elements of folk, surf rock, and ska; the lyrical themes discussed on the record include maturity, personal reflection, and fatherhood.

In 1995, Green Day released Insomniac, which did not perform as well commercially as the band's breakthrough major-label debut Dookie (1994). Speaking of Insomniac, vocalist/guitarist Billie Joe Armstrong noted, "It did a lot better than I thought it was going to do...From the sound of it, we knew it wasn't going to sell as much as Dookie." The group embarked on an extensive world tour to promote Insomniac in early 1996, which saw the band performing in sports arenas that contrasted with the small clubs the group was accustomed to playing. The members became increasingly uncomfortable with the level of stardom they had attained; Armstrong recalled, "We were becoming the things we hated, playing those big arenas. It was beginning to be not fun anymore."

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