Standard atmosphere may refer to:
A standard reference value for air pressure: Standard atmosphere (unit), a standard pressure that approximates atmospheric pressure value at sea level Standard atmospheric pressure, other reference values One of various static atmospheric models of how atmospheric pressure, density, and temperature vary with altitude, such as: The U.S. Standard Atmosphere, a series of models that give values for pressure, density, and temperature over a range of altitudes The International Standard Atmosphere (ISA), an international standard model, defining typical atmospheric properties with altitude, at mid-latitude
See also NRLMSISE-00 Standard conditions for temperature and pressure