Ammonia is a chemical compound with the formula NH3.

Ammonia may also refer to:

Ammonia (band), an Australian rock band Ammonia (foraminifera), a widespread genus of estuarine foraminiferan Ammonium hydroxide, a cleaning chemical commonly referred to as ammonia Hera Ammonia, an epithet of Greek goddess Hera Ammonia, the ancient name of Mersa Matruh SF Ammonia, a railway ferry in Norway Ammonia (data page)

See also Pneumonia