Y100
Y-100 may refer to:

 KCYY, Y100 (country music) in San Antonio, Texas
 WHYI, Y100 (Top 40 CHR) in Miami, Florida (Radio Station)
 WNCY, Y100 in Green Bay, Wisconsin
 WXYY, a former Y100 station in Rincon, Georgia (Radio Station)
 WZJZ, Y100 (Top 40 CHR) in Ft. Myers, Florida (Radio Station)
 WPLY, a former Y100 station in Philadelphia, PA