Illyricus may refer to:
- Bogumil Vošnjak (1882–1955), pseudonym Illyricus, a Slovene and Yugoslav jurist, politician, diplomat, author and legal historian
- Matthias Flacius Illyricus (1520–1575), a Lutheran reformer
- Pietro Gozze (1493–1564), called Doctor Illyricus, Ragusan Catholic prelate
- Saint Illyricus of Mount Myrsinon in the Peloponnesus (see April 3 (Eastern Orthodox liturgics))
- Thomas Illyricus (1484/5–1528/9), Dalmatian Franciscan theologian and preacher
Species and subspecies
edit- Squalius illyricus, a ray-finned fish species
- Astragalus monspessulanus subsp. illyricus, a plant subspecies