S
- Nazir Sabir (born ?) Pakistan. First Pakistani to climb Mount Everest.
- Hassan Sadpara (born ?) Pakistan. Starting as a High Altitude porter, he climbed 5xPakistani 8000ers and Everest.
- John Salathé (1900–1993) Switzerland/USA. Pioneering Yosemite National Park, inventor of modern piton.
- Horace-Bénédict de Saussure (1740–1799) France. Third ascent Mont Blanc (1787), funded first ascent.
- Marcus Schmuck (1925–2005) Austria. First ascent Broad Peak. First ascent Skil Brum.
- Peter Schoening (1927–2004) USA. First ascent Gasherbrum I and Vinson Massif. Saved 5 climbers on K2 (1953).
- Doug Scott (born 1941) UK. Seven Summits. First ascent Everest south-west face. Baintha Brakk (descent with broken ankles), Kangchenjunga, Nuptse.
- Vittorio Sella (1859–1943) Italy. Captured numerous photographs of previously unclimbed mountains.
- Chris Sharma (born 1981) USA. Award-winning rock climber. Featured in several rock climbing movies.
- John Sherman (born 1959) USA. Inventor of "V" grading system.
- Apa Sherpa (born early 1960s) Nepal. Holds the record for most ascent of Everest (20 as of 2010).
- Pasang Lhamu Sherpa (1961–1993) Nepal. First Nepali woman to climb Everest, died during descent.
- Pemba Dorjie Sherpa (born ?) Nepal. Fastest ascent of Everest (2003).
- Pemba Doma Sherpa (1970–2007) Nepal. First Nepali female mountaineer to climb Everest north face. Died on Lhotse.
- Eric Shipton (1907–1977) UK. First ascent Kamet. Pioneered route across the Khumbu Glacier.
- William Shockley (1910–1989) USA. Nobel Prize-winning physicist, proponent of eugenics. First ascent Shockleys Ceiling in the Gunks (1953).
- Joe Simpson (born 1960) UK. Survived a fall on Siula Grande. Wrote Touching the Void.
- Todd Skinner (1958–2006) USA. Rock climber. First free ascent Salathe Wall. Died on Leaning Tower.
- Cecilie Skog (born 1974) Norway. First female to climb Seven Summits and both Poles. Everest and K2.
- Laurie Skreslet (born 1949) Canada. First Canadian to summit Everest (1982).
- William Cecil Slingsby (1849–1929) UK. First ascent Store Skagastølstind (1876). Pioneer of Norwegian mountaineering.
- Frank Smythe (1900–1949) UK. First ascent Kamet (1931) with Shipton, R Holdsworth and Lewa Sherpa. Reached 8565m on Everest in 1933 without supplementary oxygen.
- Dermot Somers Ireland. Climber, author and broadcaster.
- Carlos Soria Fontán (born 1939) Spain. The only mountaineer to have ascended nine mountains of more than 8,000 meters after turning 60 years old.
- William Grant Stairs (1863–1892) Canada. First non-African to ever climb in the Ruwenzoris.
- Allen Steck (born 1926) USA. mountaineer and rock climber.
- Ueli Steck (born 1976) Switzerland. Soloed Eiger north face in 2:47:33 hours (2008).
- Leslie Stephen (1832–1904) UK. Author and alpinist. First ascent Schreckhorn, Monte Disgrazia, Zinalrothorn.
- Edward Lisle Strutt (1874–1948) UK. Deputy leader on 1922 Everest expedition. Outspoken Alpine Journal editor, 1927–37.
- Gottlieb Samuel Studer (1804–1890) Switzerland. First ascent Wildhorn (1843). Founding member of Swiss Alpine Club.
Read more about this topic: List Of Climbers And Mountaineers