| Pop Song | Live | Recd | Maps and Legends |
| Uncorrected Personality Traits: (Robyn Hitchcock) | 1989 | Live 1989: Peter Buck / Robyn Hitchcock & the Egyptians | |
| Under My Wheels: (Michael Bruce / Dennis Dunaway / Bob Ezrin) | 1989 | Vibrating Egg incl. Mike Mills (William B.Carr) / Jefferson Holt (Raoul Duplott) a.o. | |
| Underneath The Bunker: | 1987 | 1986 | Originally entitled Samba |
| Undertow: | 1995 | 1996 | Also live 1996: Michael Stipe / Laurie Anderson / Tony Shanahan |
| Underwater Acoustic: | 2001 | 2001 | Known as Disappear |
| Unknown Instrumental: (The Ventures?) | 1981 | ||
| Unknown: () | 1982 | Unknown song - probably an R.E.M. song - June 25 | |
| Unknown: () | 1984 | Unknown prelude to Auctioneer (Another Engine) - December 4 | |
| Unknown: () | 1985 | Unknown lyrics to King Of The Road - June 26 | |
| Unknown: () | 1985 | Unknown song prelude to Windout - August 31 | |
| Unknown: () | 1985 | Unknown song prelude to California Dreaming - October 15 | |
| Unknown: () | 1985 | Unknown song prelude to Windout - October 21 | |
| Unknown: () | 1985 | Unknown song prelude to Auctioneer (Another Engine) - November 30 | |
| Unknown: () | 1985 | Unknown song prelude to Second Guessing - December 8 | |
| Unknown: () | 1986 | Unknown song prelude to Fall On Me - September 6 | |
| Unknown: () | 1986 | Unknown song prelude to Oddfellows Local 151 - October 9 | |
| Unknown: () | 1986 | Unknown instrumental prelude to Superman - October 24 | |
| Unknown: () | 1986 | Unknown song prelude to Old Man Kensey - October 27 | |
| Unknown: () | 1987 | July 19. Michael Stipe & Lynda Stipe | |
| Unknown: () | 1987 | July 19. Michael Stipe & Lynda Stipe | |
| Unknown: () | 1987 | July 19. Michael Stipe & Lynda Stipe | |
| Unknown: () | 1987 | July 19. Michael Stipe & Lynda Stipe | |
| Unknown: () | 1987 | Unknown song prelude to Disturbance At The Heron House - September 3 | |
| Unknown: () | 1987 | Unknown song prelude to The Flowers Of Guatemala - October 1 | |
| Unknown: () | 1987 | Unknown song prelude to Crazy - October 4 | |
| Unknown: () | 1987 | Unknown song prelude to I Believe - October 17 | |
| Unknown: () | 1987 | Unknown song prelude to I Believe - October 19 | |
| Unknown: () | 1987 | Unknown song prelude to I Believe - October 23 | |
| Unknown: () | 1987 | Unknown song prelude to I Believe - October 29 | |
| Unknown: () | 1987 | Unknown song prelude to After Hours - November 18 | |
| Unknown: () | 1989 | Unknown song prelude to I Believe - March 15 | |
| Unknown: () | 1990 | Unknown song and instrumental - March 11 - Kevn Kinney / Peter Buck soundcheck | |
| Unknown: () | 1990 | Unknown instrumental - probably See That My Grave Is Kept Clean - March 13 - Radio Show | |
| Unknown: () | 1992 | Unknown songs performed by Peter Buck / Michelle Malone - January 31 | |
| Unknown: () | 1995 | Unknown instrumental prelude to Man On The Moon after "drop out" - February 22 | |
| Unknown: () | 1998 | Unknown instrumental by Peter Buck - Ealing Studios - October 28 | |
| Unknown: () | 1998 | Unknown instrumental prelude to Pretty Persuasion - November 9 | |
| Unknown: () | 1998 | Unknown instrumental prelude to Radio Free Europe - November 9 | |
| Unknown: () | 1998 | Unknown prelude song to New Test Leper - Italian TV B'cast - November 11 | |
| Unknown: () | 1999 | Unknown instrumental at "Party Of Five" - February 17 | |
| Unknown: () | 1999 | Unknown instrumental prelude to The Great Beyond - June 26 | |
| Unknown: () | 1999 | Unknown banjo-riff prelude to At My Most Beautiful - July 13 | |
| Unknown: () | 1999 | Unknown prelude song to Man On The Moon - July 14 | |
| Unknown: () | 1999 | Unknown prelude song ( On The Road Again ) to Sweetness Follows - July 25 | |
| Unknown: () | 1999 | Unknown prelude about "Stinking Feet" prelude to Suspicion - August 9 | |
| Unknown: () | 1999 | Unknown piano-riff prelude to Country Feedback - August 21 | |
| Unknown: () | 1999 | Unknown "Welcome to the Dollhouse"-prelude to Stand - August 30 | |
| Unknown: () | 1999 | Unknown snippet inbetween Long Road and Hope - August 31 | |
| Unknown: () | 1999 | Unknown prelude to ITEOTWAWKI - September 8 | |
| Unknown: () | 1999 | Unknown part in the middle of ITEOTWAWKI - September 10 | |
| Unknown: (Grant Lee Phillips) | 2000 | 2 Unknown song titles - Peter Buck / Grant Lee Phillips - March 7 | |
| Unknown: | 2000 | 3 Unknown song titles - Peter Buck / The Crocodile Cafe janitor - April 21 | |
| Unknown: | 2002 | Live 2002: Mike Mills plays unnamed song probably to be included on next album | |
| Untitled: | 1989 | 1988 | Known as The Eleventh Untitled Song |
| Untitled Interlude: | 1983 | 25 seconds Untitled instrumental interlude after Shaking Through | |
| Untitled Interlude: | 1983 | 20 seconds Untitled instrumental interlude between Camera and (Don't Go Back To) Rockville on Reckoning-album | |
| Untitled Instrumental # 1: | 1988 | Green demo | |
| Untitled Instrumental # 2: | 1988 | Green demo | |
| Up On The Floor: (Warren Zevon) | 1984 | Live 1984: Hindu Love Gods w/ Warren Zevon on vocals | |
| Us And You: | 1981 | Known as Ha (We Got Paid For It) |