35S

35S or 35-S may refer to:


 * Wasco State Airport (FAA identifier: 35S), an airport in Sherman County, Oregon, U.S.
 * 35th parallel south, a geographical latitude
 * Rollei 35 S, a 35 mm camera
 * Sulfur-35 (35S), the most stable radioactive isotope of sulfur, used in biochemical research to radioactively label proteins
 * HP 35s, a scientific calculator
 * the 35S promoter from the cauliflower mosaic virus, used for constitutive expression in plants