全在（英语：Omnipresence或 ubiquity ），又译遍在，指能够出现在任何地方的能力。这通常使用于宗教文本中，被当成是神祇拥有的能力之一。一神教中的唯一神，通常被认为具备有这种属性。但这个概念与泛神论不同，泛神论将宇宙整体视为一个神祇，宇宙的任意地方都是神的一部分；但是具备全在能力的神，神与宇宙是分开的个体，神可以出现在宇宙的任意地方。

The Ubiquitarians, also called Ubiquists, were a Protestant sect started at the Lutheran synod of Stuttgart, 19 December 1559, by Johannes Brenz, a Swabian (1499–1570).

Its profession, made under the name of Duke Christopher of Württemberg, and entitled the "Württemberg Confession," was sent to the Council of Trent, in 1552, but had not been formally accepted as the Ubiquitarian creed until the synod at Stuttgart. Luther had upset the peace of Germany by his disputes. In the effort to reconcile and unite the contending forces against the Turks, Charles V demanded of the Lutherans a written statement of their doctrines. This — the "Augsburg Confession" — was composed by Philip Melanchthon, and read at a meeting at Augsburg in 1530. Its tenth article concerned the Real Presence of Christ in the Blessed Sacrament, a burning question among the Protestants. In 1540, Melanchthon published another version of the "Augsburg Confession", in which the article on the Real Presence differed essentially from what had been expressed in 1530. The wording was as follows: