In eight-dimensional geometry, a **hexicated 8-simplex** is a uniform 8-polytope, being a hexication (6th order truncation) of the regular 8-simplex.

The Cartesian coordinates of the vertices of the *hexicated 8-simplex* can be most simply positioned in 8-space as permutations of (0,0,0,1,1,1,1,1,2). This construction is based on facets of the hexicated 9-orthoplex.

This polytope is one of 135 uniform 8-polytopes with A_{8} symmetry.