Ernst Haccius (11 December 1893 – 11 February 1943) was a German officer in the Wehrmacht of Nazi Germany during World War II who commanded the 46th Infantry Division.
He was a recipient of the Knight's Cross of the Iron Cross.
Haccius was killed 11 February 1943 north of Krasnodar /Caucasus; he was posthumously promoted to the rank of Generalleutnant and awarded the Knight's Cross.