Caesar von Hofacker (sometimes Cäsar;[1] 2 March 1896 – 20 December 1944) was a German Luftwaffe Lieutenant Colonel and member of the 20 July plot against Adolf Hitler.

[3][4] Hofacker's main role in the events culminating in the attempted assassination of Hitler at the Wolf's Lair on 20 July 1944 consisted of acting as a secret liaison between his cousin, Claus Graf Schenk von Stauffenberg, and another plotter in occupied Paris, General Carl-Heinrich von Stülpnagel, France's military governor, to whom he was personal adviser.

Hofacker assessed the chances of the coup attempt as "only ten percent".

[8] On 26 July 1944, Hofacker was arrested in Paris, taken to Berlin Gestapo headquarters where, according to William Shirer in The Rise and Fall of the 3rd Reich, he was horrifically tortured and gave up the name of Erwin Rommel, stating that Rommel said to "Tell the people in Berlin they can count on me".

[9] This was support for the conspiracy to overthrow Hitler, not to kill him—yet this made no difference to Hitler, who ordered the forced suicide of Erwin Rommel and a false hero's funeral.