Juan Carlos de Aréizaga (died 1816) was a Spanish general, who fought in the Peninsular War. In 1808 he was a retired colonel, residing in Pamplona, where he made friends with a young Francisco Javier Mina. After the outbreak of the Peninsular War, he moved to Zaragoza, where he became a divisional commander under Joaquín Blake (1809). He also took part in the battle of Alcañiz (May 1809).