RY

Ry is an abbreviation for railway and relay.

Ry, RY, or ry may also refer to:

First name

 * Ry Bradley (born 1980), American singer and musician
 * Ry Cooder (born 1947), American musician
 * Ry Nikonova (1942–2014), Russian artist
 * Ry Rocklen (born 1978), American artist
 * Ry Russo-Young (born 1981), American filmmaker
 * RY X (born 1988), Australian musician
 * Ryland Rose, Australian rapper formerly known as Ry

Surname

 * Paul du Ry (1640–1714), French architect
 * Simon Louis du Ry (1726–1799), French architect and grandson of Paul du Ry
 * Na Ry (born 1985), South Korean beauty queen
 * Trần Thị Hoa Ry (born 1976), Vietnamese politician

Denmark

 * Ry, Denmark, town in Jutland
 * Ry train station
 * Ry Municipality, former municipality in Jutland

France

 * Auzouville-sur-Ry, commune in Normandy
 * Grainville-sur-Ry, commune in Normandy
 * Ry, Seine-Maritime, administrative division in Normandy

Science and technology

 * Rydberg constant, unit of energy used in quantum physics related to the ground state energy of the hydrogen atom
 * Consolidated RY, former cargo aircraft of the U.S. Navy
 * RY Sagittarii, star in the constellation Sagittarius
 * RY Tauri, star in the constellation Taurus
 * RY (test signal), character string used to test five-level teleprinter channels

Business and finance

 * Rekisteröity yhdistys ('ry' or 'ry.'), a Finnish non-profit organization (lit. 'registered association')
 * Royal Bank of Canada (stock symbol RY on tsx2 and nyse2)

Other

 * Operation RY, Japanese plan to invade South Pacific islands during World War II
 * "Ry Tanindrazanay malala ô!", national anthem of Madagascar