Bootleg CDs are collections of music, usually of live or unreleased tracks, that find their way into the collectors market without the direct approval of the artist or the artist's record label. Although manufacture and distribution of these CDs is prohibited or discouraged in most countries, certain private record labels still find the channels to sell this material to dealers and fans, who often pay the premium prices that are associated with them. The sound quality is often but not strictly inferior to offically released albums, but they are still very collectible, if only for their novelty.

There is no means by which to determine if this page is a complete list, especially if you consider privately-pressed discs which are starting to invade the underground market. At this point, only record-labeled releases of mass pressings are included in this list, except where noted. To determine if a CD is either mass-produced or privately pressed, check the data of the disc (non-printed side). If it is blue-gold or green, it is a CD-R (CD-recordable) and so likely a privately pressed CD. If it is silver, then it is probably an original "factory-pressed" CD from a die. Another way to check is if the printed side of the disc is silk-screened (original) or labeled with an adhesive sticker (copy). Unfortunately, as CD recorders become more sophisticated, it will be easier for people to make copies of original CDs and sell them as "bootlegs", while identifying the two types will be harder to distinguish. This activity forces collectors to carefully inspect discs when they find them. Since these unauthorised factory-pressed discs are manufactured in limited batches, often as small as 200, their value is driven by the scarcity.

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