In Polish mythology, Bialobóg (byah-WOH-book) is the benevolent god of the waxing year.

The name derives from "bialy", meaning white.

Bialobóg was said to appear in the form of a long-bearded old man, carrying a staff and dressed in white. He was said to assist travellers.

Bialobóg was said to fight his evil brother Czarnobóg twice a year for control of that year, with Bialobóg gaining control of the waxing half of the year and Czarnobóg control of the waning half.