According to the Pulitzer.org database (April 26, 2011), the St. Louis Post-Dispatch has been nominated for 40 Pulitzers, won 17, and was a finalist for 7 more. They have been the recipient of five Pulitzer Public Service awards, the highest accolade in the newspaper industry.
Pulitzer Prize Winners
1989: Ron Olshwanger, Spot News Photography, St. Louis Post-Dispatch
1972: Frank Peters Jr., Criticism, St. Louis Post-Dispatch
1970: Marquis W. Childs, Commentary, St. Louis Post-Dispatch
1966: Robert Lasch, Editorial Writing, St. Louis Post-Dispatch
1959: William H. (Bill) Mauldin, Editorial Cartooning, St. Louis Post-Dispatch
1955: Daniel R. Fitzpatrick, Editorial Cartooning, St. Louis Post-Dispatch
1952: Public Service, St. Louis Post-Dispatch
1950: Public Service, Chicago Daily News and St. Louis Post-Dispatch
1948: Public Service, St. Louis Post-Dispatch
1946: Edward A. Harris, Telegraphic Reporting (National), St. Louis Post-Dispatch
1941: Public Service, St. Louis Post-Dispatch
1940: Bart Howard, Editorial Writing, St. Louis Post-Dispatch
1937: Public Service, St. Louis Post-Dispatch
1932: Charles G. Ross, Correspondence, St. Louis Post-Dispatch
1929: Paul Y. Anderson, Reporting, St. Louis Post-Dispatch
1927: John T. Rogers, Reporting, St. Louis Post-Dispatch
1926: D. R. Fitzpatrick, Editorial Cartooning, St. Louis Post-Dispatch