Strontium nitrate is an inorganic compound composed of the elements strontium, nitrogen and oxygen with the formula Sr(NO₃)₂. This colorless solid is used as a red colorant and oxidizer in pyrotechnics.

Strontium nitrate is typically generated by the reaction of nitric acid with strontium carbonate.

Like many other strontium salts, strontium nitrate is used to produce a rich red flame in fireworks and road flares. Its strength as an oxidizer, which eliminates the need for large amounts of an additional chlorine-containing oxidizer, makes extremely pure colors in the orange-red to red color range attainable with simple compositions.

Strontium nitrate can aid in eliminating and lessening skin irritations. When mixed with glycolic acid, strontium nitrate reduces the sensation of skin irritation significantly better than using glycolic acid alone.

As a divalent ion with an ionic radius similar to that of Ca²⁺ (1.13 Å and 0.99 Å respectively), Sr²⁺ ions mimic calcium's ability to traverse calcium-selective ion channels and trigger neurotransmitter release from nerve endings. It is thus used in electrophysiology experiments.^{[citation needed]}