S28

S28 may refer to:

Aviation

 * Blériot-SPAD S.28, a French long-distance biplane
 * International Peace Garden Airport in Rolette County, North Dakota
 * Letov Š-28, a Czechoslovak reconnaissance biplane
 * Sikorsky S-28, a proposed French biplane bomber

Roads

 * County Route S28 (California)
 * New Jersey Route 18, partially designated S28 until 1953
 * Northern Airport Expressway, China

Science

 * 40S ribosomal protein S28
 * British NVC community S28, a swamps and tall-herb fens community in the British National Vegetation Classification system
 * S28: After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer), a safety phrase
 * Sulfur-28, an isotope of sulfur

Other uses

 * S28 (Rhine-Ruhr S-Bahn)
 * HMS Vanguard (S28), a submarine of the Royal Navy
 * Mena Station, in Rankoshi, Isoya District, Hokkaido, Japan
 * SREC (file format), an ASCII encoding format for binary data
 * USS S-28 (SS-133), a submarine of the United States Navy