Strontium is a chemical element with symbol Sr and atomic number 38.

Strontium may also refer to:

Strontium Technology, a Singaporean manufacturing company Strontium unit, a unit used to measure the amount of radioactivity from strontium-90 STRONTIUM, a code name used by Microsoft for advanced persistent threat Fancy Bear

See also Strontium Dog, a British science fiction comic series Sr (disambiguation) Isotopes of strontium