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''Headquarters'' was the third album issued by The Monkees and the first written and recorded primarily by the four members of the group, rather than by session musicians and professional songwriters. After a struggle for creative autonomy with their record label, the group had been allowed to record by themselves. ''Headquarters'' reached #1 on the Billboard 200 and was certified double platinum in the U.S. with sales of more than two million copies. It is included in the 2006 book ''1001 Albums You Must Hear Before You Die''.

During the early months of 1967, the four Monkees sequestered themselves in the RCA Music Center of the World Studios, on Sunset Boulevard near Vine Street in Hollywood. Many of the songs were written by the four group members, or came together organically in jam sessions. A few of the songs were also written by songwriters Boyce and Hart. The only session musicians used on the album were producer Douglas, who played bass guitar on several songs, and the occasional cello and French horn player. Michael Nesmith recruited fellow folk musician Chip Douglas, a member of The Modern Folk Quartet and The Turtles, to produce the album. Douglas was credited under his birth name, Douglas Farthing Hatlelid.

The album was released on May 22, 1967 and charted at the number one position in the United States. It stayed at that position for only one week, and was then replaced by The Beatles' ''Sgt. Pepper's Lonely Hearts Club Band''. It then began a run of 11 consecutive weeks at the #2 position as ''Sgt. Pepper's Lonely Hearts Club Band'' remained at #1.

The album was issued on the compact disc format for the first time by Arista Records in 1987, remixed from the multi-tracks, then later from the original stereo mastertape in 1995 with several bonus tracks on Rhino Entertainment. In 2003, Rhino Entertainment, through its Rhino Handmade division, issued ''The Headquarters Sessions'', a 3-disc box set of outtakes from the session as well as the album's original monophonic mix presented in an alternate running order that was rejected before release.

In 2007, Rhino issued a two-disc deluxe edition of the album. The CD set was housed in a digipak with a slipcase and featured original album artwork (including replicas of the original Colgems vinyl labels on each disc), as well as a booklet of essays and session information by Monkees historian Andrew Sandoval. The discs contained both the stereo and mono mixes of the album, remastered, as well as alternate mixes and outtakes. - Wikipedia