• Saint Louis Art Museum (St. Louis)
• Sammlung Oskar Reinhart Am Römerholz (Winterthur)
• San Diego Museum of Art (San Diego)
• San Francisco Museum of Modern Art (San Francisco)
• Sanssouci Picture Gallery (Potsdam)
• Scottish National Gallery (Edinburgh)
• Scottish National Gallery of Modern Art (Edinburgh)
• Scottish National Portrait Gallery (Edinburgh)
• Shelburne Museum (Shelburne)
• Smithsonian American Art Museum (Washington)
• Solomon R. Guggenheim Museum (New York)
• Southampton City Art Gallery (Southampton)
• Spedale degli Innocenti (Firenze)
• Staatliche Kunsthalle (Karlsruhe)
• Städelsches Kunstinstitut und Städtische Galerie (Frankfurt)
• Statens Museum for Kunst (Copenhagen)
• Stedelijk Museum (Amsterdam)