Professional ratings
Review scores
Source	Rating
AllMusic
Blender
The Boston Phoenix
Michigan Daily	B+
PopMatters	(unfavorable)
Robert Christgau
Rolling Stone
The Rolling Stone Album Guide
Slant Magazine
Stylus Magazine	B

Room for Squares is the debut studio album by American musician John Mayer. It was released through Aware Records and Columbia Records on June 5, 2001, the album peaked at number 9 on the U.S. Billboard 200 chart. Upon its release, Room for Squares received generally positive reviews from most music critics and earned Mayer a Grammy Award for Best Male Pop Vocal Performance for the single "Your Body Is a Wonderland". It is his best-selling album to date, with sales of over 4,484,000 copies in the U.S. as of July 2014.

The album's title is a reference to Hank Mobley's No Room for Squares album. All songs from the album are written by Mayer; three songs, "No Such Thing", "Neon", and "Love Song for No One", were co-written with Clay Cook. The first two of these, along with "My Stupid Mouth" and "Back to You", originally appeared on Mayer's 1999 EP Inside Wants Out. The songs are largely based on Mayer's personal experiences.

Through constant shows, including in the Atlanta-area Eddie's Attic, Mayer's reputation began to build, and a March 2000 appearance at the South by Southwest Music Festival brought him to the attention of "launch" label, Aware Records. After including him in the Aware Festival concerts and having his songs included on Aware compilations, in early 2001, Aware released Room for Squares as an internet-only album. During that time, Aware inked a deal with Columbia Records that gave Columbia first pick in signing Aware artists, and so in September 2001, Columbia remixed and re-released Room for Squares. As part of the major label "debut", the album's artwork was updated, and the track "3x5" was added, which did not appear on the original as the recording was not yet complete at the time. The re-release included reworked studio versions of the first four songs from his indie album, Inside Wants Out. The cover art for the most recent release of Room for Squares features a periodic table design beginning from the back cover which continues to the front cover, ending at the right-side.

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