Brigadier General Dr. Mikuláš Ferjenčík (6 December 1904 – 4 March 1988) was a Czechoslovak military veterinarian, resistance fighter, and exiled politician.

By the outbreak of World War II he was chief of the Slovak Army Veterinary Service with the rank of lieutenant colonel.

[1] During the war he joined the Czechoslovakian resistance and participated in the Slovak National Uprising as chief of staff to Ján Golian.

[citation needed] On 4 August 1944, Ferjenčík was part of a delegation from the Slovak National Council that flew to Moscow carrying detailed plans of their uprising against the Nazis.

On arrival in New York he was picketed as responsible for the USSR's seizure of Czechoslovakia and immediately taken to Ellis Island as a suspected communist.