S3 Graphics, Ltd. was an American computer graphics company. The company sold the Trio, ViRGE, Savage, and Chrome series of graphics processors. Struggling against competition from 3dfx Interactive, ATI and Nvidia, it merged with hardware manufacturer Diamond Multimedia in 1999. The resulting company renamed itself to SONICblue Incorporated, and, two years later, the graphics portion was spun off into a new joint effort with VIA Technologies. The new company focused on the mobile graphics market. VIA Technologies' stake in S3 Graphics was purchased by HTC in 2011.

The S3 ViRGE (Video and Rendering Graphics Engine) graphics chipset was one of the first 2D/3D accelerators designed for the mass market.