Tiso was born in Bytča () to Slovak parents in Trencsén County of the Kingdom of Hungary, part of the Austro-Hungarian Empire. He was raised in a religious family and studied at the local elementary school. Then, as a good student with a flair for languages, he studied at a lower grammar school in Žilina. The school had clearly Hungarian spirit, since all Slovak grammar schools were closed at the time of his study. Here, he began to use the Hungarian form of his name Tiszó József. In 1902, he began to study at higher Piarist grammar school in Nitra. The Bishop of Nitra, Imre Bende, offered him a chance to study for the priesthood at the prestigious Pázmáneum in Vienna. Tiso, taught by several elite professors, became familiar with various philosophies and the newest Papal Encyclicals. He also extended his language skills. Along with already known Hungarian, German and Latin, he studied Hebrew, Aramaic dialects and Arabic. The school reports describe him mostly as an "excellent", "exemplary", and "pious" student. Enrolling in the University of Vienna in 1906, he graduated as a Doctor of Theology in 1911.