Constantin S. Constantin (May 9, 1889 - February 29, 1948) was a Romanian Major-General during World War II. He was Assistant Chief General Staff in 1939, and in 1941 was Secretary-General of Administration Ministry of Defence and then Under-Secretary of Supply. He went into reserve in 1943, and in 1944 was Deputy General Officer Commanding Capital Military Command. He went into reserve again that year, and retired in 1945. In 1946, he was arrested and in 1948 was condemned to 10 years imprisonment. He died in the Văcăreşti Prison.