超星系坐标系统，是天球坐标系统之一，他的赤道是校准在超星系平面上。这个系统用于在地的宇宙之中，主要是参考邻近的星系团，包含室女座星系团、巨引源和英仙-双鱼超星系团等，在平面(二维空间)的分布状态。虽然早在200年前的威廉·赫协尔就注意到星系分布在一个平面上的现象，但超星系坐标的基准平面在1953年才被热拉尔·佛科留斯从夏普力-恩慈目录中予以确认。

经由会议决定，超星系的经度和纬度模拟于银河坐标系统的银经(l)和银纬(b)，分别标示为SGL和SGB，坐标经度的起点(SGL=0)定义为银河平面与超星系平面的交叉点。

Supergalactic coordinates are coordinates in a spherical coordinate system which was designed to have its equator aligned with the supergalactic plane, a major structure in the local universe formed by the preferential distribution of nearby galaxy clusters (such as the Virgo cluster, the Great Attractor and the Pisces-Perseus supercluster) towards a (two-dimensional) plane. The supergalactic plane was recognized by Gérard de Vaucouleurs in 1953 from the Shapley-Ames Catalog, although a flattened distribution of nebulae had been noted by William Herschel over 200 years earlier.