Johann Nepomuk von Nostitz-Rieneck (24 March 1768 – 22 October 1840) commanded a cavalry division in the army of the Austrian Empire during the Napoleonic Wars.

Johann Nepomuk was born on 24 March 1768 in Prague, the ninth child of Count Franz Anton von Nostitz-Rieneck (1725-1794) and Countess Marie Alžběta Krakovská z Kolowrat (1728-1815).

His father's younger brother was Friedrich Moritz von Nostitz-Rieneck,[1][better source needed] a high-ranking Austrian general who became president of the Aulic Council shortly before his death in 1796.

He retired from the army at the end of 1796, but returned to military service as a general officer in late 1800.

On 28 June 1803, Nostitz wed Gräfin Antonie Josefa Schlick von Passaun (b.