 S&L MedienContor Germany | 1 | 1998 |
 S&S Publications UK | 1 | 2024 |
 S. B. Gundy Canada | 1 | 1916 |
| S. Carswell Company Canada | 1 | 1905 |
| S. E. Dawson Canada | 1 | 1903 |
| S. Fischer Verlag Germany | 24 | 1927 - 2020 |
| S. Hirzel Verlag, Leipzig East Germany | 1 | 1988 |
| S. W. Partridge And Co. UK | 2 | |
| S. Wengert Germany | 1 | 1966 |
 S.A.P.E. Spain | 1 | 1985 |
| S.B. Publications UK | 2 | 2000 |
 S.H.R. France | 1 | 1990 |
| S.T. Publishing UK | 10 | 1991 - 1997 |
 Saalfield USA | 1 | 1924 |
| Saalfield Publishing Company USA | 1 | 1934 |
| Saalfield Publishing Company Canada | 3 | 1975 |
| Saatkorn Verlag, Hamburg Germany | 4 | |
| Saba - Bücher Germany | 2 | |
| Sabena-Bücher, Schälter & Co., Hemer-Sundwig Germany | 2 | |
| Sabre UK | 8 | 1962 - 1967 |
| Sachsenverlag East Germany | 1 | 1952 |
| Saddleback Educational Publishing USA | 2 | 2008 - 2015 |
 Saeculum Romania | 1 | 1994 |
| SAEP France | 1 | 2009 |
| SAF UK | 3 | 1991 - 2008 |
 SAF Comics Slovenia | 1 | 2005 |
| SAF Publishing UK | 3 | 2001 - 2008 |
| Safari-Verlag, Berlin Germany | 2 | 1934 - 1956 |
 Sagoma Editore Italy | 2 | 2010 - 2015 |
 Saint-Pétersbourg Russia | 1 | 1902 |
| Salal Press Canada | 1 | 2004 |
| Salamander UK | 12 | 1977 - 2000 |
| Salamander AG Kornwestheim Germany | 5 | 1980 - 1988 |
| Salami & Eggs Publishing USA | 1 | 2013 |
| Salani Editore Italy | 6 | 1961 - 2016 |
| Salem USA | 1 | 2022 |
| Salem House USA | 1 | 1988 |
| Salem Softbacks USA | 1 | 1981 |
| Salmon UK | 3 | |
| Salt Publishing UK | 1 | 2013 |
 Saltdal Kommune Norway | 4 | 2000 - 2006 |
| SaltPoint Imprint USA | 1 | 2021 |
| Salvat Spain | 1 | 1971 |
 Salzburger Druckerei Austria | 1 | 2001 |
| SAM Publications UK | 1 | 2002 |
 Samfundet Sverige-Finland Sweden | 1 | 1997 |
| Samizdat House USA | 1 | 1991 |
 Samizdat-BG Bulgaria | 1 | 2015 |
 Samler Børsen Denmark | 1 | 2002 |
 Sammakko Finland | 3 | 2006 - 2011 |
| Sammlerverlag Schwatlo Germany | 1 | 2000 |
| Sammlung Luchterhand Germany | 2 | 1980 - 2008 |
| Sammon Publishing Ltd UK | 1 | 2000 |
| Sample Magic USA | 1 | 2012 |
| Sampo Bulgaria | 1 | 1991 |
| Sampson Low UK | 3 | 1946 - 1948 |
| Sampson Low, Marston & Co. Ltd. UK | 1 | 1948 |
| Sampson Low, Marston, Low, & Searle UK | 1 | 1873 |
| Sams International | 1 | 1999 |
| Samuel French USA | 5 | 1966 - 2010 |
| Samuel French International | 1 | 2010 |
| Samuel Stevens Canada | 1 | 1977 |
| Samuel Weiser, Inc. USA | 3 | 1969 - 1975 |
| San Diego Comic-Con International USA | 1 | 2009 |
| San Francisco Architect USA | 1 | 2013 |
| San Paolo Italy | 1 | 2012 |
| San Ramon Valley Historical Society USA | 2 | 1991 - 1996 |
 San'ei Shobo Publishing Japan | 5 | 2010 - 2013 |
| Sanborn USA | 1 | 1999 |
| Sanctuary International | 2 | 1996 - 2003 |
| Sanctuary UK | 20 | 1996 - 2005 |
| Sanctuary Inns Limited UK | 1 | 1985 |
| Sanctuary Publishing International | 3 | 1996 - 2002 |
| Sanctuary Publishing UK | 6 | 2001 - 2004 |
| Sandcastle UK | 1 | 2013 |
 Sanderus Belgium | 1 | |
| Sandoz & Fischbacher France | 1 | 1875 |
| Sandpiper UK | 1 | 1999 |
| Sandstone Press UK | 6 | 2011 - 2023 |
| Sandstone Publishing Canada | 1 | 1981 |
| Sandy Creek USA | 1 | 2012 |
| Sankey Hudson UK | 1 | 1935 |
 Sanoma Uitgevers Netherlands | 11 | 2003 - 2016 |
| Santa Monica Press USA | 3 | 2008 - 2011 |
| Santway Photo-Craft Co. USA | 1 | |
| Saphir Canada | 1 | 2011 |
| Saphyr France | 2 | 2015 - 2022 |
| Sapling UK | 1 | 1996 |
| Saptamana Financiara Romania | 1 | 2007 |
| Saraband UK | 1 | 2020 |
| Sarabande Books USA | 1 | 2005 |
| Saskatchewan Archives Board Canada | 3 | 1971 - 1984 |
| Saskatchewan Diamond Jubilee And Canada Centennial Corporation Canada | 1 | 1967 |
| Saskatchewan Highway Traffic Board Canada | 2 | |
| Saskatchewan Parks And Recreation Association And Saskatchewan Recreation Facility Association Canada | 1 | |
| Saskatchewan Teachers' Federation Canada | 1 | 1968 |
| Saskatchewan Western Development Museums Canada | 1 | 1989 |
| Saskatchewan Wetland Conservation Corporation Canada | 1 | |
| Saskatchewan Writers Guild Canada | 1 | 1986 |
| Saskatoon Board Of Education Canada | 2 | 1973 - 1982 |
| Saskatoon Board Of Trade Canada | 2 | 1911 - 1913 |
| Saskatoon Environmental Society Canada | 1 | 1975 |
| Saskatoon Gallery And Conservatory Corporation Canada | 1 | 1972 |
| Saskatoon Lions Speed Skating Club Canada | 1 | 1987 |
| Saskatoon Writers' Club Canada | 1 | 1981 |
| Sasquatch Books USA | 1 | 1999 |
| Saturday Review Press USA | 2 | 1972 - 1975 |
| Saturday Review Press/Dutton USA | 1 | 1974 |
| Saturn Line Novels USA | 1 | 1967 |
| Saturnino Calleja Spain | 1 | 1900 |
| Savas Press Romania | 5 | 1993 - 1994 |
| Savelli Editori Italy | 3 | 1977 - 1981 |
| Savoy UK | 8 | 1977 - 1992 |
| Savukeidas Finland | 1 | 2013 |
| Saxon Och Lindströms Förlag Sweden | 7 | 1938 - 1964 |
 Saxum Hungary | 1 | 1996 |
| SB Publications UK | 1 | 1991 |
 SBR Trinidad and Tobago | 1 | 2014 |
| Scala Italy | 1 | 1993 |
| Scali France | 1 | 2007 |
 Scalo Switzerland | 3 | 1997 - 2003 |
| Scan-Globe A/S Denmark | 1 | 1973 |
| Scantec International | 1 | 1989 |
| Scarabée Et Compagnie France | 1 | 1983 |
| Scarecrow Press USA | 15 | 1973 - 2013 |
| Scarlet Reader USA | 1 | 1964 |
| Sceptre UK | 23 | 1990 - 2014 |
| Schaffstein Germany | 1 | 1950 |
| Schardt Verlag, Oldenburg Germany | 1 | 2005 |
| Scherz Germany | 96 | 1961 - 2020 |
| Scherz Action Krimi Germany | 4 | 1974 - 2022 |
| Scherz Verlag München Germany | 2 | 1974 - 1978 |
| Schibsted Förlagen Sweden | 1 | 2008 |
| Schiffer Publishing USA | 20 | 1990 - 2024 |
| Schiffer Publishing UK | 1 | 1998 |
| Schildts Finland | 1 | 2005 |
| Schirmer USA | 4 | 1977 - 2003 |
| Schirmer Books USA | 13 | 1981 - 1998 |
| Schirmer Books UK | 1 | 1998 |
| Schirmer Trade Books International | 1 | 1995 |
| Schirmer Trade Books USA | 3 | 1999 - 2003 |
| Schirmer's Visuelle Bibliothek Germany | 1 | 1989 |
| Schirmer/Mosel Germany | 1 | 2004 |
| Schirmer/Mosel France | 1 | 1989 |
| Schmolt Germany | 1 | |
| Schneekluth Germany | 9 | 1963 - 2003 |
| Schneidegger Germany | 2 | |
| Schneider Germany | 221 | 1933 - 2002 |
| Schneider Media Germany | 1 | 2010 |
| Schneider Verlag Hohengehren Germany | 1 | 1994 |
| Schocken USA | 6 | 1968 - 2001 |
| Schöffling & Co. Germany | 10 | 1996 - 2021 |
| Scholarly Resources Inc. USA | 1 | 1983 |
| Scholastic UK | 16 | 1987 - 2013 |
| Scholastic USA | 155 | 1961 - 2018 |
 Scholastic Australia | 1 | 2008 |
| Scholastic International | 2 | 1991 |
| Scholastic Canada | 1 | 2021 |
| Scholastic Book Services USA | 21 | 1963 - 1978 |
| Scholastic Book Services International | 24 | 1968 - 1981 |
| Scholastic Canada Inc. Canada | 1 | 2024 |
| Scholastic Inc. USA | 9 | 2000 - 2020 |
| Scholastic Inc. International | 4 | 1999 - 2004 |
| Scholastic Press USA | 11 | 1998 - 2020 |
| Scholastic-Tab Publications Canada | 1 | 1973 |
| Scholastic/Madison Press Canada | 1 | 1996 |
| Schöningh Germany | 6 | 1969 - 1975 |
| Schrader & Partner Germany | 1 | 1979 |
| Schreitersche Verlagsbuchhandlung Germany | 2 | |
| Schreyer Germany | 1 | |
| Schriftenreihe Der Volkhochschule Marktredwitz - Heft 23 Germany | 1 | 1978 |
| Schroedel Germany | 10 | 1974 - 1997 |
| Schuler Germany | 2 | 1976 |
| Schulte & Gerth Germany | 2 | 1984 - 1996 |
| Schützen-Verlag, Berlin Germany | 1 | |
| Schwabenverlag Germany | 1 | 1975 |
| Schwager & Steinlein Verlag Germany | 1 | 2000 |
| Schwaneberger Germany | 36 | 1940 - 2002 |
| Schwann Record Catalogs USA | 1 | 1977 |
| Schwarzkopf & Schwarzkopf Germany | 9 | 1999 - 2014 |
| Schweizer Druck- Und Verlagshaus AG, Zürich Switzerland | 2 | 1952 - 1962 |
| Schweizer Verlagshaus AG, Zürich Switzerland | 1 | 1962 |
| Schweizer Volks-Buchgemeinschaft Switzerland | 1 | 1960 |
| Science Fiction Book Club USA | 3 | 1981 - 1996 |
| Science Fiction Book Club / Arbor House USA | 1 | 1984 |
| Science-Fiction & Fantasy Publications USA | 1 | 1957 |
| Scientia Verlag Aalen Germany | 2 | 1976 - 1977 |
| Scion UK | 24 | 1950 - 1954 |
| Scm Press UK | 1 | 1970 |
| Scolar Press UK | 1 | 1969 |
| Scooter & Scooterist Ltd UK | 1 | 1996 |
| Scorpio Germany | 1 | 2010 |
| Scorpion Publications UK | 1 | 1991 |
| Scotforth Books UK | 1 | 2002 |
| Scotland Street Press UK | 1 | 2020 |
| Scotnik Press USA | 1 | 2015 |
| Scott Publications USA | 1 | 1946 |
| Scott Publishing USA | 1 | 1946 |
| Scott Publishing Canada | 1 | 1972 |
| Scott, Foresman And Company USA | 1 | 1977 |