Petar Gojniković or Peter of Serbia (ca.

870 – 917) is Prince of the Serbs from 892 to 917.

He rules and expands the First Serbian Principality (Rascia), and wins several wars against other family members who seek the crown.

He is the first Serbian monarch with a Christian (non-Slavic) name.

Petar is the son of Gojnik, the youngest son of Vlastimir (r. 831–851) of the first Serbian dynasty (ruling since the early 7th century).