Károly Beregfy (12 February 1888 – 12 March 1946) was a Hungarian military officer and politician, who served as Minister of Defence in the 1944–45 Arrow Cross Party government.

The commission examining the reasons of the defeat established Beregfy's personal responsibility, so he was dismissed from his field command.

After Operation Margarethe Arrow Cross leader Ferenc Szálasi sought him out and asked him to assist in a coup if Miklós Horthy tried to negotiate a surrender.

Beregfy declared Hungary a manoeuvre area on 30 October and subordinated all attainable human and economical resources to the war.

He was hanged on 12 March 1946, along with Ferenc Szálasi, Gábor Vajna, former interior minister in the Arrow Cross Party's cabinet and József Gera, who was a Hungarist ideologist.