KIOO (99.7 FM) is a commercial radio station licensed to Porterville, California, and serving the Visalia-Tulare-Hanford area of Central California.

It airs a classic rock format and is owned and operated by Momentum Broadcasting LP.

KIOO is a Class B FM station with an effective radiated power (ERP) of 25,000 watts.

KIOO signed on the air on August 1, 1972; 52 years ago (1972-08-01).

In its early years, KIOO aired an automated beautiful music format, featuring instrumental cover versions of popular adult songs.