Hugó Lojka (6 January 1845 – 7 September 1887) was a Hungarian teacher and lichenologist.

His father was an evangelical minister from Moravia who had become a naturalized citizen of Hungary, and instilled a love of Hungarian nationality in his children.

[3] In 1886, on his return from an extended journey in Transylvania, he contracted pleurisy,[4] which compelled him to give up teaching.

Examples include lichens collected by New Zealand physician and botanist Charles Knight and by Australian naturalist Richard Helms that were included in Lojka's Lichenotheca Universalis.

(1899); Lecanora lojkaeana Szatala (1954); Lecanora lojkahugoi S.Y.Kondr., Lőkös & Hur (2015); Lecidea lojkae Szatala (1932); Lichinella lojkana Hue (1898); Parmelia lojkana Gyeln.