Levytsky was born on November 18, 1859 in the settlement of Tysmenytsia of today's Ivano-Frankivsk Oblast into the family of a Greek Catholic priest. He was the oldest child of Rev. Antin Levytsky, who was in particular the priest in Nyzhniv and Constancia Kozorowska Levytska. After finishing the Stanislaviv gymnasium he studied at Law faculties of Lviv and Vienna Universities. In 1884 he was awarded the Doctor's degree in law, and in 1890 opened the barrister's office in Lviv. Kost Levytsky took active part in public and political life in his student years, he was one of the leaders of Academic Fraternity, the Circle of Law. From the first years of his barrister's practice K. Levytsky was a practical advocate of the rights and freedoms of people. He united his professional activity with that in the sphere of Ukrainian enterprises, he was a co-founder and leading figure in the economic associations Zorya, People's trade, Dniester, Province Credit Union. At the same time he was a well-known scientist in law, translated foreign laws into Ukrainian, worked with Ukrainian law terminology; he had published German-Ukrainian Law Dictionary, a series of popular works in law for the broad circles of Galician people, founded such professional editions as Chasopys pravnycha and Zhyttia i pravo and was their editor.
Political career
Kost Levytsky was a patriarch of Ukrainian political life, leader of the land's first political organizationNarodna Rada, a cofounder and a head of Ukrainian National Democratic Party. In 1907 he was elected an ambassador of the Austrian parliament, in 1908, that of Galician Sejm, headed the ambassador's clubs. He fought for the national aspirations of Ukrainian people. K. Levytsky was the author of the conception of the national movement development through evolution, organic work and broad political work in masses; he was the adherent of the strategic course for Galicia autonomy as the first step to ward statehood. He favoured development of the mass Ukrainian societies, units of intellectuals, peasants, youths, the Sokil-Sich movement.
At the onset of the World War I he headed the Supreme Ukrainian Council in Vienna, which defined Tsarist Russia as the main enemy of the nation, and called Ukrainians to the struggle against it for the restoration of a united Ukrainian state. In 1916, as a prosecutor for the Austro-Hungarian Empire, he played a role in the sentencing to death of Ukrainian Russophiles, and sent others to imprisonment in Talerhof. In Autumn 1918, in the course of disintegration of the Austro-Hungarian empire K. Levytsky became a member of the Ukrainian National Council, which announced formation of the Ukrainian state on October 19, and on November 1 the Council headed a victorious armed uprising in Lviv, Galicia and Bukovyna, which resulted in formation of the West Ukrainian People's Republic. Being an experienced public and political figure, K. Levytsky headed the first government – State Secretariate – which developed under the war the state and army formation activity for independence against Poland. After K. Levytsky's resignation in December 1918 he was a head of the commission on elaboration of the election reform, a representative in the affairs of press and propaganda, in foreign affairs; he also headed diplomatic missions of ZUNR which were sent to Riga, Geneva, he was a member of the ZUNR delegation in Genoa, headed a Committee of political emigration. After the government self-liquidation in 1923, in accordance with the decision of the League of Nations on annexation of Eastern Galicia, he returned to Lviv. In the years between wars he was a member of the Central Committee of the Ukrainian National Democratic Association, was a director of Centrobank, head of the Union of Ukrainian Barristers, author of fundamental scientific works including The History of the Liberation Struggles of the Galician Ukrainians Since the War of 1914–1918, The Great Derangement: On the History of Ukrainian State in March–November 1918 on the Basis of Recollections and Documents.