István Sándor (26 October 1914 – 8 June 1953) was a Hungarian Salesian and labourer, martyr and Blessed.

His father, István Sándor, worked for MÁV, the Hungarian State Railways, as an unskilled worker.

His mother, Mária Fekete, gave decent education to István and his two younger brothers, László and János, despite the family's poor circumstances.

As an aspirant, he soon took part in the Salesians' education of children, and he dealt with the altar boys primarily.

The Clarisseum was a great opportunity for the education of young people, because this building did not only give home to the order's press but also to a foster-home which started as an orphanage in 1882 by countess Károlyi (née Clarisse Kornis).

Initially, István Sándor could work as a vestryman, but, beside this, he also continued dealing with the youth underground.

At the end of February 1951, ÁVH was informed about a part of István Sándor's illegal activity, so they began to shadow him in secret.

He was already near the western border of Hungary when he changed his mind and decided he would rather undertake martyrdom than leave the youth in his care alone.

After weeks of hearings, he was tried along with 15 other people (nine ÁVH soldiers, five Catholic priests and two civilians including a 15-year-old high school girl).

The Budapest Court of Military reached a verdict in a secret trial held from 28 to 30 October 1952.