Rach

Rach may refer to:
 * Random Access Channel (RACH), a feature of mobiles or other wireless devices
 * Rach, Iran, a village in South Khorasan Province, Iran
 * Sergei Rachmaninoff, the composer. "Rach" is a colloquial short form of his surname, most commonly used to refer to some of his compositions, such as "Rach 2" (Piano Concerto No. 2) "Rach 3" (No. 3)
 * Rachel (given name). "Rach" is the colloquial short form of this given name
 * Royal Aberdeen Children's Hospital or RACH, a paediatric hospital, in Aberdeen, Scotland

Other

 * Johannes Rach (1720–1783), Danish painter who sketched Batavia (now Jakarta, Indonesia) in the 17th century
 * Rach, the traditional name for Saint Dismas in the Eastern Orthodox Churches