Dinitrotoluene and nitric acid are concurrently produced by continuously roducing toluene, nitrogen dioxide and oxygen in a molar ratio of at least 4 mols nitrogen dioxide and 1 mol oxygen per mol toluene into a reaction zone containing a reaction medium comprising dinitrotoluene and 93-103% nitric acid, maintaining the resulting mixture of toluene, nitrogen dioxide, oxygen and reaction medium under a pressure of at least 100 psig and at a temperature up to about 100.degree. C. until a reaction product containing dinitrotoluene and 93-103% nitric acid in the ratio of about 1 mol dinitrobenzene and 2 mols nitric acid is produced, and continuously removing said reaction product from the reaction zone.