KOSO (92.9 FM) is a radio station broadcasting a Hot AC format. Licensed to Patterson, California, USA, it serves the Modesto area. The station is currently owned by iHeartMedia, Inc..
The station previously had an adult contemporary format and was branded as "KO93".
The mainstream AC format would continue until summer of 1995, when the station was rebranded as "B93". As a result, the station shifted to a hot AC format.
In 1997, B93 began to transition towards a modern AC format, adding more alternative-leaning artists such as Alanis Morissette, Counting Crows, Gin Blossoms, and The Cranberries to its playlist.
On June 1, 2009, at midnight KOSO moved from 93.1 MHz to 92.9 MHz as a result of the start of 93.1 FM (KHJQ) Pollock Pines, CA which began broadcasting in June 2009.
On October 2, 2012 KOSO shifted their format to Hot AC, branded as "Radio 92.9".