Baltic Finnic paganism, or Baltic Finnic polytheism was the indigenous religion of the various Baltic Finnic peoples, specifically the Finns, Estonians, Võros, Setos, Karelians, Veps, Izhorians, Votes and Livonians, prior to Christianisation. It was a polytheistic religion, worshipping a number of different deities. The chief deity was the god of thunder and the sky, Ukko; other important deities included Jumala, Ahti, and Tapio. Jumala was a sky god; today, the word "Jumala" refers to a monotheistic God. Ahti was a god of the sea, waters and fish. Tapio was the god of the forest and hunting.
Baltic Finnic paganism included necrolatry (worship of the dead) and shamanism (tietäjä(t), literally "one who knows"), and the religion was not always uniform across the areas it was practiced, as customs and beliefs varied during different periods of time and regions. Baltic Finnic paganism shares some features with its neighbouring Baltic, Norse and Germanic pagan beliefs.