亚硝酸酯，通式为R-ONO，是一类含氮有机化合物。亚硝酸酯可看做是亚硝酸与醇类酯化形成的酯。

一般由醇与亚硝酸钠在硫酸中反应制备。

也可由二级溴代烷与亚硝酸银反应而得。亚硝酸根离子有双位反应性能，如果以一级溴代烷为原料，则与卤代烃在氮上反应，主要产物为硝基化合物。这个反应称为Meyer合成（Victor Meyer合成）。

Alkyl nitrites are a group of chemical compounds based upon the molecular structure R-ONO. Formally they are alkyl esters of nitrous acid. They are distinct from nitro compounds (R-NO₂).

The first few members of the series are volatile liquids; methyl nitrite and ethyl nitrite are gaseous at room temperature and pressure. The compounds have a distinctive fruity odor. Another frequently encountered nitrite is amyl nitrite (3-methylbutyl nitrite).