The Ångström unit (1 Å = 10 m) in which the wavelengths of light and interatomic spacings in condensed matter are sometimes measured is named after him. The unit is also used in crystallography as well as spectroscopy.
The crater Ångström on the Moon is named in his honour.
One of the main building complexes of Uppsala University, the Ångström Laboratory, is named in his honour. This building houses various departments including the Department of Physics and Astronomy, Department of Mathematics, Department of Engineering Sciences, Institute of Space Physics, and the Department of Chemistry.