Heinrich Tillessen (November 27, 1894, Cologne – 12 November 1984, Koblenz) was one of the murderers of Matthias Erzberger, the former minister of finance of the Centre Party.
One of his brothers was Karl Tillessen, the deputy of Hermann Ehrhardt in the Organisation Consul.
The other accomplice in the crime was Heinrich Schulz.
The trial of Heinrich Tillessen was held in postwar Germany, and received widespread attention from the public and legal experts, exemplifying numerous problems in the judicial processing of crimes before and during the Nazi period.