- OAKLAND REVOLT [Oakland, CA]
v.1 no.2 (Nov.-Jan. 2003) - OAKZONE (Kentfield, CA)
1 issue (1972) - OAR (Monterey, CA)
no.2 (Dec. 1966) - O-BLĒK (Stockbridge, MA)
no.6 (Fall 1989) - OBLIVIOUS (San Francisco, CA)
no.4 [April 2005]; (June 2005) - OBLIVIOUS NATION
see Oblivious - OBOE (San Francisco, CA)
no.1 (Spring 1978) – no.6 (Spring 1983)
Location: FB 8 (no.6 only) - OCCIDENT (Berkeley, CA)
(Fall 1961) – v.100 no.1 (Spring 1980) Br - OCCURRENCE (Mechanicsburg, PA)
no.2 (1974) - OCTOJELLO (Portland, OR)
no.2 (1996) - ODDA-TALA (San Francisco, CA)
no.1 (1968) - OF MESSAGE AND MAGIC
see Yaswen, Gordon - OF PATIENCE AND PERSERVERANCE
see Yaswen, Gordon - OF STRAITS AND SPREADINGS
see Yaswen, Gordon - THE OFFICIAL DRAGQUEEN HANDBOOK (San Francisco, CA)
no.1 [199-?] - OI BOY (San Francisco, CA)
no.4 (n.d.) – no.5 (n.d.) - OINK! (Chicago, IL)
no.19 (1985) - OLE (Bensenville, IL; Wood Dale, IL; San Francisco, CA)
v.1 no.1 (1964); no.3 (Nov. 1965) – no.8 (Apr. 1967)
see also Open Skull - OMEN (Tuscon, AZ)
no.1 (1970) – no.2 (1971)
Location: FB 8 - OMNIBUS OF FUN (San Francisco, CA)
no.11 (Feb. 2003) - ON OUR RAG (San Francisco, CA)
[no.2] (1991) – no.4 (Winter 1991) - ON THE MUNI
see Yu, Annie - ON THE RUN (Munich, Germany)
no.2 (n.d.) - 1 UP (Los Angeles, CA)
no.1 (Winter 2001) - OPEN ARMS (Livermore, CA)
no.1 [196-?] - THE OPEN CELL (Berkeley, CA)
v.1 no.10 (1970) – v.2 no.1 (1973)
Location: FB 9 - OPEN LETTER (Toronto, Canada)
no.1 (1966) – v.2 no.1 (Winter 1971/1972) Br - OPEN SKULL (San Francisco, CA)
no.1 (1967)
see also Ole - OPEN SPACE (San Francisco, CA)
no.0 (Jan. 1964) – no.1 (n.d.) - OPEN 24 HOURS (Washington, DC)
no.12 (Spring 1996) - OPTIC NERVE (Berkeley, CA)
no.6 (Sept. 1993) – no.7 (Summer 1994) - OR (Los Angeles, CA)
no.1 (spring 2008) – no.12 (spring 2014)
Location: FB9 - THE ORANGE RUG (San Francisco, CA)
1 issue (Feb. 1968) - THE ORCHARD (Sebastopol, CA)
v.1 no.1 (1976) - ORCHIDS ARE FERAL
see Decosta, Solidad - ORGAN & BONGOS (Seattle, WA)
no.7 (1997) - ORGASM (San Francisco, CA)
1 issue (2007) - ORIENTAL BLUE STREAK (Placitas, NM)
1 issue (Spring 1968) - ORO MADRE (Fremont, CA)
v.1 no.3 (Summer 1982) – v.1 no.4 (1982); v.2 no.3/4 (1984) - ORPHEUS (Phoenix, AZ)
v.1 no.3 [1967] - OTHER (San Francisco, CA)
no.2 (Oct. 2003) – no.13 (Feb. 2008) Br - OTHER PEOPLE EXIST (San Francisco, CA; Astoria, NY)
no.1 (2004) – no.17 (2008);
no.19 (2008); no.26 (2009);
no.28 (2010) – no.29 (2010);
no.33 (2012) – no.34 (2012) - EL OTRO LADO (Oakland, CA)
1 issue [199-?] - OTTOTOLE (Berkeley, CA)
no.1 (Fall 1985) – no.2 (Winter 1986/87) - OUJIA INTERVIEW (Chicago, IL)
no.1 & 2 (Oct. 9, 2003) – no.3 (Sep. 10, 2004)
(Includes ephemera) - OUT OF SIGHT (San Francisco, CA)
v.1 no.2 (Aug. 1966) - OUT THERE (Chicago, IL)
no.12 (n.d.) – no.13 (Fall 1977) - OUTCAST (Santa Fe, NM)
no.1 (1966) – no.6 (1967); no.8 (1968) – no.15 (1969) - OUTLET (Berkeley, CA)
no.2 (Sep. 1998) - OUTPUNK (San Francisco, CA)
no.1 [1992];
no.2½ (Sep. 1994) – no.7 (Fall 1997) - THE OUTSIDER (New Orleans, LA)
v.1 no.1 (Fall 1961) – v.2 no.4/5 (Winter 1968/69) Br - OVER THE TRANSOM (San Francisco, CA)
no.12 (2002)
no.15 (2006) - OVUM 10 (Montevideo, Uruguay)
no.1 (Dic. 1969) - OXYGEN (San Francisco, CA)
no.4 (Feb./Apr. 1992) – no.7 (1993); no.13 (1995) – no.20 (2000)
(Includes ephemera)