KWIN (97.7 FM) is an American commercial radio station located in Stockton, California, broadcasting to the Stockton, Lodi, Tracy, Modesto, and Turlock, California, area on 97.7 FM. They simulcast an Mainstream Urban format with sister station KWNN, which is located in Turlock, California, at 98.3 FM. Both are owned by Cumulus Media. Its studios are in Stockton, and its transmitter for KWIN is located between Stockton and Lodi, while the one for KWNN is in Hughson, California.

KWin is a window manager for the X Window System and is currently in the process of becoming a Wayland compositor. It is released as part of KDE Plasma 5 for which it is the default window manager. KWin can also be used on its own or with other desktop environments.