Omnipresence or ubiquity is the property of being present anywhere and everywhere. The term omnipresence is most often used in a religious context as an attribute of a deity or supreme being, while the term ubiquity is generally used to describe something "existing or being everywhere at the same time, constantly encountered, widespread, common". Ubiquitous can also be used as a synonym for words like worldwide, universal, global, pervasive, all over the place.

The omnipresence of a supreme being is conceived differently by different religious systems. In monotheistic beliefs like Christianity and Judaism, the divine and the universe are separate, but the divine is present everywhere. In pantheistic beliefs, the divine and the universe are identical. In panentheistic beliefs, the divine interpenetrates the universe, but extends beyond it in time and space.