The SPARCstation 20 or SS20 (code-named Kodiak) is a discontinued Sun Microsystems workstation introduced in March 1994 based on the SuperSPARC or hyperSPARC CPU.

It is one of the last models in the SPARCstation family of Sun "pizza box" computers, which was superseded by the UltraSPARC design in 1995.

A limitation in all releases of the OpenBoot PROM for the SPARCstation 20 prevents it from booting from a point on a disk past the 2 gigabyte mark.

The SPARCstation 20 has a built-in 13W3 video socket driven by an optional SX (CG14) framebuffer built onto a VSIMM.

The SPARCstation 20 uses a battery-backed NVRAM module to hold data about the system, such as the host ID (serial number) and MAC address.