物理学中，劳仑兹协变性（英语：Lorentz covariance）是时空的一个关键性质，出自于狭义相对论，适用于全域性的场合。局域劳仑兹协变性（英语：Local Lorentz covariance）所指为仅「局域」于各点附近无限小时空区域的劳仑兹协变性，此则出于广义相对论。劳仑兹协变性有两个不同、但紧密关联的意义：

注意到：「协变的」这个词汇的使用不应与概念上相关的「一个协变矢量」有所混淆。在流形上，词汇「协变」与「逆变」指的是客体在广义座标变换下是采怎样的转变方式。较易造成混淆的一点是：协变与逆变四维矢量都可以是劳仑兹协变量。

In physics, Lorentz symmetry, named for Hendrik Lorentz, is "the feature of nature that says experimental results are independent of the orientation or the boost velocity of the laboratory through space". In everyday language, it means that the laws of physics stay the same for all observers that are moving with respect to one another with a uniform velocity. Lorentz covariance, a related concept, is a key property of spacetime following from the special theory of relativity. Lorentz covariance has two distinct, but closely related meanings: