Johannes Sikkar (October 15, 1897 – August 22, 1960) was the first head of the Estonian government in exile as Acting Prime Minister (January 12, 1953 – January 1, 1962).
Sikkar was born in Kõnnu, Tartu County. Sikkar served in the Estonian War of Independence against post-revolutionary Soviet Russia on armoured train as a voluntary and an officer, he was granted a farm, which he held until 1944. He finished economic faculty of Tartu University cum laude in 1936. In 1920 he married Hilda Vilhelmine Truus (1900–1995) and had a son and a daughter.
He was member of National Assembly from June 15, 1926, to December 31, 1937.
In 1940 and 1944 he participated in resistance against Soviet and German occupations and escaped to Sweden September 12, 1944.
There he was appointed and adjured minister by August Rei, 3rd Pater Estoniae on April 20, 1952, and Acting Prime Minister, as head of government in exile, and Minister of Interior on January 12, 1953. Because such political activities were then prohibited for Estonian exiles in Sweden, members of his government assumed their offices in Oslo, Norway.
He died in Stockholm, Sweden.